GM factory mistake, 350 Vet motor in my 72. - The 1947 - Present Chevrolet & GMC Truck Message Board Network

EZTHERE · 06-04-2010, 07:41 PM

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 · 06-04-2010, 08:28 PM

Quote:

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.

Quote:

Originally Posted by EZTHERE

Did the 72 Jimmy's come with 4bbls?

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

Jtrux · 06-04-2010, 08:58 PM

Quote:

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 · 06-05-2010, 12:54 AM

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** · 06-05-2010, 01:02 AM

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

**Tom Vogel** · 06-05-2010, 08:46 AM

Quote:

Originally Posted by KevsClassics

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

heheheh

pumpkin · 06-05-2010, 12:59 PM

Small block chev is a small block chev. If its in a corvett, its a corvett engine, if its in a truck, its a truck small block. Most vetted just came with regular old small blocks, maybee a bit better cam, its not till you get into things like an LT1. 2.02 heads, SOLID lifter cams, forged cranks, stronger rods and such. Having a corvette 350 means nothing. I have a motorhome sbc 400 in my blazer that will wax a vette 350. Get over the Corvette option. Gm did on ocasion put hotter than called for 350's in vehicles, by mistake, at change overs, or when thay ran out of what was called for. I have a buddy that worked at a GM dealer back when our trucks were new, and he found a few of these. He tells me that the owners of these vehicles, would come in complaining that the engine didn't idle as smooth as his neighbors. So under warranty the would change out the Corvette camshaft for the smaller cam.

06-04-2010, 07:41 PM	#1
EZTHERE Registered User Join Date: May 2010 Location: USA Posts: 18	Re: GM factory mistake, 350 Vet motor in my 72. 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?

06-05-2010, 12:54 AM	#4
EZTHERE Registered User Join Date: May 2010 Location: USA Posts: 18	Re: GM factory mistake, 350 Vet motor in my 72. 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

06-05-2010, 01:02 AM	#5
KevsClassics TILT COLUMN GURU Join Date: Dec 2006 Location: FRESNO CA Posts: 4,276	Re: GM factory mistake, 350 Vet motor in my 72. Maybe it's one of those rare Corvette optioned trucks. __________________ Instagram kevs_classics64 64 Impala SS Conv 72 Blazer 2wd 75 Jimmy 2wd 63 Belair wagon 02 Silverado ext cab. DD RIP EL JAY

06-05-2010, 12:59 PM	#7
pumpkin Registered User Join Date: Apr 2006 Location: East Sooke B.C. Canada Posts: 543	Re: GM factory mistake, 350 Vet motor in my 72. Small block chev is a small block chev. If its in a corvett, its a corvett engine, if its in a truck, its a truck small block. Most vetted just came with regular old small blocks, maybee a bit better cam, its not till you get into things like an LT1. 2.02 heads, SOLID lifter cams, forged cranks, stronger rods and such. Having a corvette 350 means nothing. I have a motorhome sbc 400 in my blazer that will wax a vette 350. Get over the Corvette option. Gm did on ocasion put hotter than called for 350's in vehicles, by mistake, at change overs, or when thay ran out of what was called for. I have a buddy that worked at a GM dealer back when our trucks were new, and he found a few of these. He tells me that the owners of these vehicles, would come in complaining that the engine didn't idle as smooth as his neighbors. So under warranty the would change out the Corvette camshaft for the smaller cam.



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