GM factory mistake, 350 Vet motor in my 72.

[EZTHERE]

I just bought a 72 GMC Jimmy from an impound lot. After chatting with the original owner. He tells me the truck had lots of power. So when he looked at the front pad serial numbers he couldnt find them after he talked with the dealer. It turns out to be a factory mistake. GM installed a 350 vet motor. Per GM. I have not varified this yet.

Has anyone ever heard of that before??

does this make this a rare truck or an odd ball. Im thinking odd ball.

[EZTHERE]

Carb is a Rochester "4MV" Quadra-Jet 4-barrel carburetor. the motor is painted orange.

At the moment im at work, so I dont now what the numbers are. Did the 72 Jimmy's come with 4bbls?

[Critter]

Originally Posted by EZTHERE

Has anyone ever heard of that before??

Yes we have "heard" of it lots of times, but so far they have all been inaccurate or an engine that was put in by a previous owner etc, but never actually installed by GM. Not trying to burst your bubble, but a whole mess of people on here joke about the "rare corvette option" blazer/jimmy/truck. Just warning you.

Originally Posted by EZTHERE

Did the 72 Jimmy's come with 4bbls?

On a 350, yes, the 4bbl Q-Jet was very common.

[Jtrux]

Originally Posted by Critter

Yes we have "heard" of it lots of times, but so far they have all been inaccurate or an engine that was put in by a previous owner etc, but never actually installed by GM. Not trying to burst your bubble, but a whole mess of people on here joke about the "rare corvette option" blazer/jimmy/truck. Just warning you.



On a 350, yes, the 4bbl Q-Jet was very common.

Not just common, but mandatory. I think the only 2bbl carbs were put on 307's. And i'd say that it's probably possible for the dealer to swap motors at the owners request and dime but not too likely. My dad has a 77 chevy lwb 4x4 that just plain hauls a$$. A peak under the hood revels bone stock engine, stock carb, intake, manifolds, everything. The guy he bought it from insisted it was the original stock engine, I just couldn't believe it so a little poking around under the hood and you can tell someone has been into it, it may just be a cam install but it doesn't take much to pep one of these motors up a little. Stock cams sucked. So what i'm saying is that it's very possible for someone to crack into it and change the cam, especially if the paint looks pretty fresh or if just the water pump and timing cover are painted. Those are dead giveaways.

[EZTHERE]

ok these are the numbers ive gotten.

RT head. 3973487X date K 3 1.

LT head. 3973487x date k 4 1.

Manifold 6263751

Rochester Q jet 17054927

Front pad. V11 I 6 TDG

the manifold gives it away. Its a 200hp 350, I can reach the block number.

I could use some help with the engine number on the front pad. thanks

[KevsClassics]

Maybe it's one of those rare Corvette optioned trucks.

[71RestoRod]

Pretty sure mine was a corvette 350 too. Crossed the intake number with a corvette and they were both marked 18436572.


btw, welcome aboard!

[JimmyFloyd]

On your front pad, the Engine Suffix is that of a truck:

TDG 1972 350 conv,cab 175 4 K-10 & 20
TDG 1972 350 M/t 175 4 K-10 & 20

And it is a Flint Plant Motor (V), and I believe the numbers were 1116, which would be November 16th

Info: http://www.nastyz28.com/sbchevy/sblock.php#ecode