GM Engine Sizes (was Chevy engines)

Tom Sharpe twsharpe at mtco.com
Sun Nov 8 03:09:35 GMT 1998



David A. Cooley wrote:

> At 10:59 AM 11/7/98 -0800, you wrote:
> >
> >
>
> >
> >> Not a lot of people realize that the (later) GMC 307 CID V-6 truck motor
> >> was a sawed off 409.
> >
> >The GMC truck V-6, V-8 and V-12 gas and diesel engines were all 60 degree
> >blocks and thus shared nothing from the 348-409 engines.
> >
>
> In the early 60's, GMC used both a 305 and 350 CI 90 deg. V6 that shared a
> block with the 305 and 350 V6 diesel counterparts. (Heads, crank, rods,
> pistons, cam and intake were different, as well as having an injection pump
> instead of distributor...).  This was a very torquey engine... My dad had
> the 305 in his 63 GMC pickup... you could dump the clutch at idle in 4th
> gear and it wouldn't kill the motor... it would chirp the tires and start
> moving!
> Later,
> Dave

I'd like to see one with 20 lbs boost... the block/crank/heads look like they
could handle it ...A torque monster.    Tom




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