GMC V-6 info - The 1947 - Present Chevrolet & GMC Truck Message Board Network

larouchedem · 11-26-2002, 05:05 PM

Hi All,
I'm new, and reading the various boards got me interested in the GMC V-6s. Anyone know where I can find on-line tech info on them? Do they share any parts with the bigger old V-6s that were used in busses and dump trucks and such?
TIA
Dave

Longhorn Man · 11-26-2002, 06:06 PM

Follow this link...it'll tell you everything you wanna know about the 305 and 351 GMC V-6 engines.
http://www.favorites.com/~jolly/305V6.htm

larouchedem · 11-26-2002, 08:02 PM

thanks much.
Dave

Quote:

Originally posted by longhornmail
Follow this link...it'll tell you everything you wanna know about the 305 and 351 GMC V-6 engines.
http://www.favorites.com/~jolly/305V6.htm

larouchedem · 11-26-2002, 10:56 PM

longhornmail,

Cool site. I wish it showed pics of the internals, such as combustion chambers. Thanks much though.
I didn't know they made a V-12.

Btw - I checked your 425 caddy powered site. Fyi - you might not know, the heads off of that '71 472 are 20cc smaller chamber than your 425 heads [76cc vs 96cc]. If your 425 is 8-1 CR, they'd take you to 9.3-1 or so.
Dave

[/i]
Follow this link...it'll tell you everything you wanna know about the 305 and 351 GMC V-6 engines.
http://www.favorites.com/~jolly/305V6.htm [/QUOTE]

Longhorn Man · 11-27-2002, 06:35 PM

Yep...that's the main reason I am holding onto them. One day I plan on doing a little work to them and slapping them on there.
In rality, they will probably sit on a shelf in the basement untill I die.

Gordo · 11-28-2002, 11:19 AM

Those V-6's were a strong. low end torque engine, too bad somebody put the heads on backwards! (LOL)

Longhorn Man · 11-28-2002, 11:37 AM

It is really too bad Chevy didn't adopt some of the ideas off of this little monster...I lovew the way the spark plugs go into the heads on this thing...it just makes so much sence.

And as far as the twin 6.... DROOOOOOOOOL

lukecp · 11-28-2002, 03:33 PM

One of my friends just got a '63? GMC schoolbus with either a 305 or 351 V6 in it. If he dosen't use the V6 for a truck pull truck, i may be able to get it for pretty cheap. It dosen't run, and i have no idea what i would do with it, but it would be cool to have.

Longhorn Man · 11-28-2002, 03:56 PM

I know... I would LOVE to have one on a stand in the living room for freak value alone!

11-26-2002, 05:05 PM	#1
larouchedem Registered User Join Date: Nov 2002 Posts: 36	GMC V-6 info Hi All, I'm new, and reading the various boards got me interested in the GMC V-6s. Anyone know where I can find on-line tech info on them? Do they share any parts with the bigger old V-6s that were used in busses and dump trucks and such? TIA Dave

11-28-2002, 11:19 AM	#6
Gordo Registered User Join Date: Jan 2001 Location: Killingworth, CT. USA Posts: 3,378	Those V-6's were a strong. low end torque engine, too bad somebody put the heads on backwards! (LOL) __________________ 1971 C10 swb stepside 350/700R4/3.73posi (retired as of 4/22/03) 1998 S10 short bed 2002 S10 Blazer 1942 Oldsmobile 1958 Massey Harris Pony 1951 Wife Killingworth, Connecticut May those who love us, love us, any of those who do not love us, may God turn their hearts. And if God is unable to turn their hearts, may he turn their ankles so we may know them by their limping. A man who works with his hands is a laborer; a man who works with his hands and his brain is a craftsman; but a man who works with his hands and his brain and his heart is an artist.

11-28-2002, 03:33 PM	#8
lukecp Formerly yellow72custom Join Date: May 2001 Location: Austin, TX Posts: 7,531	One of my friends just got a '63? GMC schoolbus with either a 305 or 351 V6 in it. If he dosen't use the V6 for a truck pull truck, i may be able to get it for pretty cheap. It dosen't run, and i have no idea what i would do with it, but it would be cool to have. __________________ '72 Chevy C10 Mild 350/TH350/3.07. Ochre/White. Old high school ride. '70 GMC C2500 '62 327 4bbl/SM465/4.56-geared Dana 60. White/White. Project or parts truck. '97 Saturn SL DD. 1.9/5-speed. 40+ highway mpg

11-26-2002, 06:06 PM	#2
Longhorn Man its all about the +6 inches Join Date: Jan 2001 Location: Hilliard Ohio Posts: 2,690	Follow this link...it'll tell you everything you wanna know about the 305 and 351 GMC V-6 engines. http://www.favorites.com/~jolly/305V6.htm

11-26-2002, 10:56 PM	#4
larouchedem Registered User Join Date: Nov 2002 Posts: 36	longhornmail, Cool site. I wish it showed pics of the internals, such as combustion chambers. Thanks much though. I didn't know they made a V-12. Btw - I checked your 425 caddy powered site. Fyi - you might not know, the heads off of that '71 472 are 20cc smaller chamber than your 425 heads [76cc vs 96cc]. If your 425 is 8-1 CR, they'd take you to 9.3-1 or so. Dave [/i] Follow this link...it'll tell you everything you wanna know about the 305 and 351 GMC V-6 engines. http://www.favorites.com/~jolly/305V6.htm [/QUOTE]

11-27-2002, 06:35 PM	#5
Longhorn Man its all about the +6 inches Join Date: Jan 2001 Location: Hilliard Ohio Posts: 2,690	Yep...that's the main reason I am holding onto them. One day I plan on doing a little work to them and slapping them on there. In rality, they will probably sit on a shelf in the basement untill I die.

11-28-2002, 11:37 AM	#7
Longhorn Man its all about the +6 inches Join Date: Jan 2001 Location: Hilliard Ohio Posts: 2,690	It is really too bad Chevy didn't adopt some of the ideas off of this little monster...I lovew the way the spark plugs go into the heads on this thing...it just makes so much sence. And as far as the twin 6.... DROOOOOOOOOL

11-28-2002, 03:56 PM	#9
Longhorn Man its all about the +6 inches Join Date: Jan 2001 Location: Hilliard Ohio Posts: 2,690	I know... I would LOVE to have one on a stand in the living room for freak value alone!



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