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05-18-2015, 07:38 PM
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Join Date: Jan 20, 2006
Location: The Great Googley Moogley Midwest.
Posts: 17,265
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those are forged pistons? i thought keith black was hyperyou whatsit only?
__________________
Quote:
Originally Posted by Hankrod
Ristows right.................again,
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Quote:
Originally Posted by Fasts79Chief
... like the little 'you know what's' that you are.
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Quote:
Originally Posted by Fasts79Chief
I LOVE how Ristow has stolen my comment about him ... "Quoted" it ... and made himself famous for being an ***hole to people. Hahahahahahahahahha!
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→ Where the kids hang out...
fsjbuilder.org come for the mindless chat,stay for the hand drawn emoticons.
It's like you're unraveling a big cable-knit sweater that someone keeps knitting...and knitting...and knitting...and knitting...
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05-18-2015, 08:24 PM
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232 I6
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Join Date: May 06, 2008
Location: Albuquerque, NM
Posts: 202
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Hyperyou whatsit... lol Hyper-Eutectic... KB does sell some forged, just not many... Cast and forged pistons are eutectic, 12% silicon... Hyper-Eutectic castings have more silicon in it, about 18%...
Yea the ones I ordered are Hyper-eutectic instead of forged... the hypers are a lot stronger than regular eutectic cast pistons, but not as strong as forged... They have a much lower coefficient of thermal expansion (because the melting point of the alloy is higher) so the tolerances can be much tighter then with forged or even regular cast pistons so the cold start noise will be very little...
__________________
1974 Jeep J20, gladiator grill, 6BTA JWAC cummins, HX55, 4in exhaust to 5in stack, nv4500/ford np205, 14b kingpin axle, 14b rear axle, 4.56 gears, 37x12.50r16.5 Military tires.
Future mods:
G56 6 speed with dual disk clutch
Vintage air AC and Heat underdash combo unit
40x13.50r17 tires on 17x10 wheels
Last edited by BA_051 : 05-18-2015 at 08:31 PM.
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06-04-2015, 12:52 PM
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232 I6
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Join Date: May 06, 2008
Location: Albuquerque, NM
Posts: 202
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Alrighty! Well the crank is done, just need to go pick it up... Turns out the mains were already turned 0.020" under so they are now 0.030" and the rods are STD 360 size... I'll get pics up tonight when I get it!!
__________________
1974 Jeep J20, gladiator grill, 6BTA JWAC cummins, HX55, 4in exhaust to 5in stack, nv4500/ford np205, 14b kingpin axle, 14b rear axle, 4.56 gears, 37x12.50r16.5 Military tires.
Future mods:
G56 6 speed with dual disk clutch
Vintage air AC and Heat underdash combo unit
40x13.50r17 tires on 17x10 wheels
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06-06-2015, 10:12 AM
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232 I6
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Join Date: May 06, 2008
Location: Albuquerque, NM
Posts: 202
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Here are the pics of the reworked 401 crank...
Vat cleaned, magnafluxed, offset ground to 3.8" stroke with standard size 360 rod bearings, straitened, shot peened, mains turned from 0.020" to 0.030" under and oil passages chamfered. Cost... $275... And ready to go!
I decided to add the additional cost to magnaflux it just to make sure the crank had no cracks and sure enough, there were none...

__________________
1974 Jeep J20, gladiator grill, 6BTA JWAC cummins, HX55, 4in exhaust to 5in stack, nv4500/ford np205, 14b kingpin axle, 14b rear axle, 4.56 gears, 37x12.50r16.5 Military tires.
Future mods:
G56 6 speed with dual disk clutch
Vintage air AC and Heat underdash combo unit
40x13.50r17 tires on 17x10 wheels
Last edited by BA_051 : 10-03-2017 at 12:37 PM.
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06-06-2015, 12:59 PM
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Join Date: Jan 20, 2006
Location: The Great Googley Moogley Midwest.
Posts: 17,265
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i woulda nitrided it too.
you got rockers?
__________________
Quote:
Originally Posted by Hankrod
Ristows right.................again,
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Quote:
Originally Posted by Fasts79Chief
... like the little 'you know what's' that you are.
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Quote:
Originally Posted by Fasts79Chief
I LOVE how Ristow has stolen my comment about him ... "Quoted" it ... and made himself famous for being an ***hole to people. Hahahahahahahahahha!
|
→ Where the kids hang out...
fsjbuilder.org come for the mindless chat,stay for the hand drawn emoticons.
It's like you're unraveling a big cable-knit sweater that someone keeps knitting...and knitting...and knitting...and knitting...
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06-06-2015, 01:33 PM
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232 I6
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Join Date: May 06, 2008
Location: Albuquerque, NM
Posts: 202
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Yea I was looking into nitriding it, but they quoted me another $325 for that... My budget is already $350 over for the rockers/pushrods/cam kit...
And yes I got the rockers! Will be sweet! 2 of them had a little binding on the roller tip so no worries since you sent extras!!
If my new 0.030" under mains come in by next Friday or Saturday, then I'll take PTO the following Monday-sunday to get it built and running 
__________________
1974 Jeep J20, gladiator grill, 6BTA JWAC cummins, HX55, 4in exhaust to 5in stack, nv4500/ford np205, 14b kingpin axle, 14b rear axle, 4.56 gears, 37x12.50r16.5 Military tires.
Future mods:
G56 6 speed with dual disk clutch
Vintage air AC and Heat underdash combo unit
40x13.50r17 tires on 17x10 wheels
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06-06-2015, 01:41 PM
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Join Date: Jan 20, 2006
Location: The Great Googley Moogley Midwest.
Posts: 17,265
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well,at .030 you're about at the limit on the crank,on a crank that is getting hard to come by. nitriding will save it if an issue arises. but yah,it aint' cheap.
__________________
Quote:
Originally Posted by Hankrod
Ristows right.................again,
|
Quote:
Originally Posted by Fasts79Chief
... like the little 'you know what's' that you are.
|
Quote:
Originally Posted by Fasts79Chief
I LOVE how Ristow has stolen my comment about him ... "Quoted" it ... and made himself famous for being an ***hole to people. Hahahahahahahahahha!
|
→ Where the kids hang out...
fsjbuilder.org come for the mindless chat,stay for the hand drawn emoticons.
It's like you're unraveling a big cable-knit sweater that someone keeps knitting...and knitting...and knitting...and knitting...
|

07-05-2015, 07:48 PM
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232 I6
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Join Date: May 06, 2008
Location: Albuquerque, NM
Posts: 202
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Well, Its been a while since I posted, its been very busy the past few weeks... This past Tuesday, I got the motor pulled, checked valve clearances, cut the valve reliefs for the intake valves (exhaust clearances were over 0.150" and 0.060" radially), and took the rotating assembly to be balanced on Wednesday. I did get pictures so I will try and get them posted as soon as I can. I should get everything back on the 7th or 8th so I can finally get it assembled and fired up!
Well I guess they got a late start on the balancing so I'll get everything back the end of the week. After months of planning it all coming together...
__________________
1974 Jeep J20, gladiator grill, 6BTA JWAC cummins, HX55, 4in exhaust to 5in stack, nv4500/ford np205, 14b kingpin axle, 14b rear axle, 4.56 gears, 37x12.50r16.5 Military tires.
Future mods:
G56 6 speed with dual disk clutch
Vintage air AC and Heat underdash combo unit
40x13.50r17 tires on 17x10 wheels
Last edited by BA_051 : 07-07-2015 at 12:47 PM.
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07-16-2015, 05:30 PM
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232 I6
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Join Date: May 06, 2008
Location: Albuquerque, NM
Posts: 202
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Well I checked everything over and getting everything prepped for assembly and I hit another snag... I forgot the 390/401's had a smaller width rod journal than the 290-360...
Correct me if I am wrong...
The 401 rod had a pin diameter of 1.000", width of 0.995" and a base width (rod journal) of 0.916"
The 360 rod had a pin diameter of 0.930", width of 0.995" and a base width (rod journal) of 0.995"
So I will need to narrow my rods to the 401 rod journal width and everything will bold together! It ticks me off that even the shop did not pick up on the difference on rod thickness and will rebalance my assembly for free when i get the rods cut down...
__________________
1974 Jeep J20, gladiator grill, 6BTA JWAC cummins, HX55, 4in exhaust to 5in stack, nv4500/ford np205, 14b kingpin axle, 14b rear axle, 4.56 gears, 37x12.50r16.5 Military tires.
Future mods:
G56 6 speed with dual disk clutch
Vintage air AC and Heat underdash combo unit
40x13.50r17 tires on 17x10 wheels
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08-11-2015, 05:36 PM
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232 I6
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Join Date: May 06, 2008
Location: Albuquerque, NM
Posts: 202
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__________________
1974 Jeep J20, gladiator grill, 6BTA JWAC cummins, HX55, 4in exhaust to 5in stack, nv4500/ford np205, 14b kingpin axle, 14b rear axle, 4.56 gears, 37x12.50r16.5 Military tires.
Future mods:
G56 6 speed with dual disk clutch
Vintage air AC and Heat underdash combo unit
40x13.50r17 tires on 17x10 wheels
Last edited by BA_051 : 10-03-2017 at 12:42 PM.
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08-11-2015, 06:53 PM
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Join Date: Jan 20, 2006
Location: The Great Googley Moogley Midwest.
Posts: 17,265
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looks good. them pushrod slots long enough? looks awful close.
__________________
Quote:
Originally Posted by Hankrod
Ristows right.................again,
|
Quote:
Originally Posted by Fasts79Chief
... like the little 'you know what's' that you are.
|
Quote:
Originally Posted by Fasts79Chief
I LOVE how Ristow has stolen my comment about him ... "Quoted" it ... and made himself famous for being an ***hole to people. Hahahahahahahahahha!
|
→ Where the kids hang out...
fsjbuilder.org come for the mindless chat,stay for the hand drawn emoticons.
It's like you're unraveling a big cable-knit sweater that someone keeps knitting...and knitting...and knitting...and knitting...
|

08-17-2015, 01:54 PM
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232 I6
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Join Date: May 06, 2008
Location: Albuquerque, NM
Posts: 202
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Indeed they are. I checked all of them before I put the covers on. There is about 0.030" in both the seated and max lift positions and more at half lift.
Have he motor in and accessories on, just need a day to start it up and begin the break in...
__________________
1974 Jeep J20, gladiator grill, 6BTA JWAC cummins, HX55, 4in exhaust to 5in stack, nv4500/ford np205, 14b kingpin axle, 14b rear axle, 4.56 gears, 37x12.50r16.5 Military tires.
Future mods:
G56 6 speed with dual disk clutch
Vintage air AC and Heat underdash combo unit
40x13.50r17 tires on 17x10 wheels
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08-18-2015, 11:47 AM
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Join Date: Jan 20, 2006
Location: The Great Googley Moogley Midwest.
Posts: 17,265
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sounds like its good. what are you running for valve springs. i'd like to see dual springs or a damper spring setup on those heads.
__________________
Quote:
Originally Posted by Hankrod
Ristows right.................again,
|
Quote:
Originally Posted by Fasts79Chief
... like the little 'you know what's' that you are.
|
Quote:
Originally Posted by Fasts79Chief
I LOVE how Ristow has stolen my comment about him ... "Quoted" it ... and made himself famous for being an ***hole to people. Hahahahahahahahahha!
|
→ Where the kids hang out...
fsjbuilder.org come for the mindless chat,stay for the hand drawn emoticons.
It's like you're unraveling a big cable-knit sweater that someone keeps knitting...and knitting...and knitting...and knitting...
|

08-18-2015, 07:11 PM
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Member
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Join Date: Jan 05, 2013
Posts: 98
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I would love to see this with mpfi.
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08-21-2015, 03:47 PM
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232 I6
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Join Date: May 06, 2008
Location: Albuquerque, NM
Posts: 202
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I'll have to go digging around for my receipt for the heads when I had them done. They are not stock since I'm running 4 groove keepers and they moved the retainers lower on the valve stem. They are running 120lbs seat pressure vs the stock is 90lbs.
I'm pretty sure they are comp cams springs..
I heard quite a few people having issues with the exelbrock mpfi setup... But I'm using my 2" bore TBI with the 16197427 PCM with the 46lb injectors at 30-32 psi with a vacuum referenced regulator.
going to fire it up tomorrow morning since I don't have to be at work until noon...
__________________
1974 Jeep J20, gladiator grill, 6BTA JWAC cummins, HX55, 4in exhaust to 5in stack, nv4500/ford np205, 14b kingpin axle, 14b rear axle, 4.56 gears, 37x12.50r16.5 Military tires.
Future mods:
G56 6 speed with dual disk clutch
Vintage air AC and Heat underdash combo unit
40x13.50r17 tires on 17x10 wheels
Last edited by BA_051 : 08-21-2015 at 03:55 PM.
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08-23-2015, 12:35 PM
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232 I6
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Join Date: May 06, 2008
Location: Albuquerque, NM
Posts: 202
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Well... After priming the oil pump with a drill and installing the distributor and dumping about 2oz fuel down the tbi... It fired right up! No knocks, no pings, no issues! Idle oil pressure is 70-72 lbs and after running down the highway for 30 mins it idles at 650 with 40lbs at 195 degrees. Never had such good oil pressure...
Also added an oil cooler and use an FLA-1 oil filter... Took 7 quarts to fill from bone dry to top of the hash on the dipstick...
Smooth idle, no where near the lope of the k8600 and not 1 drop of any fluid anywhere...
Now to get rid of that leaky 7/8" CJ clutch slave cylinder and install the 1" ford cylinder... Looked it up under a '58 ford f100...

__________________
1974 Jeep J20, gladiator grill, 6BTA JWAC cummins, HX55, 4in exhaust to 5in stack, nv4500/ford np205, 14b kingpin axle, 14b rear axle, 4.56 gears, 37x12.50r16.5 Military tires.
Future mods:
G56 6 speed with dual disk clutch
Vintage air AC and Heat underdash combo unit
40x13.50r17 tires on 17x10 wheels
Last edited by BA_051 : 10-03-2017 at 12:56 PM.
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08-23-2015, 02:44 PM
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Join Date: Jan 20, 2006
Location: The Great Googley Moogley Midwest.
Posts: 17,265
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very nice.
__________________
Quote:
Originally Posted by Hankrod
Ristows right.................again,
|
Quote:
Originally Posted by Fasts79Chief
... like the little 'you know what's' that you are.
|
Quote:
Originally Posted by Fasts79Chief
I LOVE how Ristow has stolen my comment about him ... "Quoted" it ... and made himself famous for being an ***hole to people. Hahahahahahahahahha!
|
→ Where the kids hang out...
fsjbuilder.org come for the mindless chat,stay for the hand drawn emoticons.
It's like you're unraveling a big cable-knit sweater that someone keeps knitting...and knitting...and knitting...and knitting...
|

08-24-2015, 12:19 PM
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350 Buick
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Join Date: Feb 15, 2010
Location: arizona
Posts: 1,325
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great to hear, how does it feel? more torque/power?
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08-24-2015, 01:20 PM
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232 I6
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Join Date: May 06, 2008
Location: Albuquerque, NM
Posts: 202
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Ohh yea... Real snappy throttle, revs real quick and the truck rocks when I do lol... I need to be careful in 1st and 2nd now or the back end is all over lol... Now it's time to save up for the 5 speed and 4.56 regear...
__________________
1974 Jeep J20, gladiator grill, 6BTA JWAC cummins, HX55, 4in exhaust to 5in stack, nv4500/ford np205, 14b kingpin axle, 14b rear axle, 4.56 gears, 37x12.50r16.5 Military tires.
Future mods:
G56 6 speed with dual disk clutch
Vintage air AC and Heat underdash combo unit
40x13.50r17 tires on 17x10 wheels
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08-25-2015, 04:34 AM
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350 Buick
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Join Date: Feb 15, 2010
Location: arizona
Posts: 1,325
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sounds good, keep us updated on it
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