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Old 07-01-2021, 10:15 AM
Dave Jeeper Dave Jeeper is offline
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1977 J20- what OEM emission controls?

There is a 1977 J20 401 manual tranny for sale locally. Did this vehicle come with air injection and a catalytic converter? The power steering pump has a 2 groove pulley but there is no second belt and there is no air pump.


We have emission testing where I am.
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Old 07-01-2021, 10:42 AM
inkedmonkey inkedmonkey is offline
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My 77 did. I took it all off but I think my pump is frozen.
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Old 07-01-2021, 11:00 AM
Bob Barry Bob Barry is offline
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A catalytic converter would not be installed on 49-state vehicles until 1979; I don't know about California.
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Old 07-01-2021, 12:14 PM
conehead conehead is offline
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Do they have a antique or classic car registration you can use in Colorado? We do here in PA and don't have to worry about emissions.
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Old 07-01-2021, 12:20 PM
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tgreese tgreese is offline
 
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Replied to you on FSJNetwork.

Jeep sold no '77 401 trucks with a manual transmission. Something has been changed. Look at the VIN.
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Old 07-01-2021, 08:23 PM
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babywag babywag is offline
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Quote:
Originally Posted by Dave Jeeper
There is a 1977 J20 401 manual tranny for sale locally. Did this vehicle come with air injection and a catalytic converter? The power steering pump has a 2 groove pulley but there is no second belt and there is no air pump.


We have emission testing where I am.

air yes...cat unlikely

have seller provide vin and proof it has a 401.

engines get swapped all time.
could special order anything back then from dealer or they would do it(swap) to make a sale.

I know several CO folks that have had zero issues with a swapped 401 and smog testing. if it passes the test by numbers.
some places don't care about all smog crap.

play stupid and just have it tested
asking/offering info on a swap just creates unnecessary hassles...
many times nothing is needed other than smog pump & related crap being there even if it's not functional
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Old 07-01-2021, 09:46 PM
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goldhammer goldhammer is offline
 
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Take a look at the block to verify a 401. Molded on it by the motor mount bosses. I've looked at a couple of Z code rigs, and they had had transplants to a 360 and 304.
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Old 07-08-2021, 12:13 PM
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rang-a-stang rang-a-stang is offline
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I had a buddy with a 77 Cherk, true dual exhaust, no cats, and it sailed through CA emissions.

Like babywag said (at least here in vintage car hating CA), it all comes down to what the VIN says (what it is SUPPOSED to have) and engine that is there. In CA, if the VIN says it is supposed to be a 360 2bbl but the rig currently has a 401 and a 4bbl, you can have it ref'ed to a 401 and be completely legal as long as the 401 is a 77 or newer and it meets all the emissions requirements for the year the engine was manufactured. The tech manuals have all the smog info in them.

So, if the VIN has a Z in it, as long as the 401 (verify it IS a 401 by looking at the casting number) is still a 4bbl and has the air injection (or a Howell) and EGR, you should be good. I don't think you need EVAP in 77 but check the tech manual.

Another thing I have notice here: smog techs hate smogging our trucks. They take for ever, they are a PITA, and the techs just don't have the expertise they used to. It's not hard to get these through smog as long as all your stuff works but 99.99% of all smog techs cannot tell the difference between a 401 and 360, a Duraspark/prestolite/HEI, etc. They look for new and shiny parts to question. So, as long as the carb "looks" original and the exhaust manifolds are cast iron and a little rusty, you should be fine. If you have an Edelbrock logo hanging on your carb, or a bright red HEI Cap that says some aftermarket name on it, prepare for the gnashing of teeth.
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Old 07-08-2021, 03:38 PM
Dave Jeeper Dave Jeeper is offline
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Thanks everyone,


I think that I am going to pass on this one. Too many vehicle projects already.


Dave
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