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  #1  
Old 01-10-2002, 03:38 AM
bigwillys bigwillys is offline
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Does anyone know anything about these? I have never had one personally, but a lot of people say that they are extremely durable, and based on the bore to stroke ratio (the're just bored out 250 cid blocks), they should take thrashing pretty well. If anyone has any performance building information for these engines, i'd appreciate it, as I am looking into one to replace the tired 360 in my 88 GW.
Thanks

[ February 05, 2002: Message edited by: Sitting Bull ]</p>
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  #2  
Old 01-10-2002, 03:48 AM
joe joe is offline
 
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They seem to hold up real well but even stock parts are hard to find let alone performance stuff. I don't recomemend swapping one in.
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  #3  
Old 01-10-2002, 09:23 AM
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I agree with Joe as I've had a couple. Very solid built motor with a great lower end on them. Problems I had with them were mostly centered around the starter. They had a cheesy solenoid setup which you can't seem to buy anymore. They had good advertised hp and torque but seemed to be kind of flat compared to a 360 let alone a 401.
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  #4  
Old 01-10-2002, 12:22 PM
joe joe is offline
 
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<BLOCKQUOTE>quote:</font><HR>Originally posted by J20 project:
They had good advertised hp and torque but seemed to be kind of flat compared to a 360 let alone a 401.
J20
<HR></BLOCKQUOTE>


J20, I agree they're good motors but so far as HP goes keep in mind that in 72 the US auto industry changed to "net" HP ratings and before that they were rated "gross" HP(no external pumps, access bolted on). You can convert gross-to-net HP by roughly subtracting about 30%-35%.
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Old 01-10-2002, 03:29 PM
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Joe, Agreed, the hp #'s are skewed because of that, even so the rigs back then rarely had much higher than 4:09 tailgearing and compared to a late model wag w/ 3:07's they still should have felt better than they did. One upside to it though, my 65 J200 couldnt break traction in most if not all situations and that meant my wheels stayed glued to the road pretty well. You just had your foot mashed to the floor all the time on the highway. J20
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  #6  
Old 01-10-2002, 04:40 PM
joe joe is offline
 
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Yeah I can't really compare the early motor power wise. The one I drove seemed ok but it was 30 years old at the time. Never had a chance to run a fresh AMC 327.
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  #7  
Old 01-11-2002, 03:04 PM
rhinoherd rhinoherd is offline
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The Vigilantes work pretty good for me in several of my trucks, but I don't drive them as daily drivers. I do prefer the Buicks if a stock engine is the deal you have to work with. You can buy performance parts for Buicks, but they are expensive. I oughta know, I'm have one balanced and blueprinted at the present time.
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  #8  
Old 01-12-2002, 12:06 AM
andy d andy d is offline
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<BLOCKQUOTE>quote:</font><HR>Originally posted by bigwillys:
Does anyone know anything about these? I have never had one personally, but a lot of people say that they are extremely durable, and based on the bore to stroke ratio (the're just bored out 250 cid blocks), they should take thrashing pretty well. If anyone has any performance building information for these engines, i'd appreciate it, as I am looking into one to replace the tired 360 in my 88 GW.
Thanks
<HR></BLOCKQUOTE>
just curious as to your plans get to a pre smog mtr past the MA smog nazis. i have a hard enough time with my 30k re-manned 360 with all the smog eqpt.
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  #9  
Old 01-12-2002, 12:28 PM
smithhl smithhl is offline
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I planned to rebuild mine to run on propane with two turbochargers. It's a four barrel, and it'll spin the tires in 2nd (wide ratio t-18). I don't know how many miles the engine has on it or if it had a rebuild on it, but it still had the power to pull the top out of a pine tree that was two & a half feet at the bottom. I've also ran it dry of oil twice (bad oil pan) once it locked up. I poured more oil into it, and it unlocked and still runs with out knocking.

But if I was going to do another engine transplant I'd go with a new duramax or powerstroke.
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  #10  
Old 01-14-2002, 01:16 PM
Joe J-Truck Joe J-Truck is offline
304 AMC
 
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They're OK engines, but very hard to get parts for and the starter always seems to be a problem. You have to pull the exhaust manifold to even get at it?!!?
The distributer is in the back and no HEI or any performance parts are available. The old school valve seats aren't hardened because they were designed for leaded fuel. With todays unleaded gas, you risk valve damage unless you install hardened seats or always add lead substitute.
If you have a running 327, great. It's worth throwing parts at it to keep the old jeep alive. They make good torque and are good tough mills that can take lots of abuse.
If you're planning a full-on machine shop rebuild for a project, I'd use a more common engine.
I think it would make the best sense to just rebuild your amc 360!
It's on of my favorite engines... very reliable and parts are plentiful. They're easy to work on and performance parts are readily available with many intake, exhaust, and cam choices.
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