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

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]

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]