Originally Posted by cepx111
Ok, you need compression!!!
First off I'd get the heads milled, with OEM pistons them big chambered 6x heads will have your compression pretty low > 7.6 to 1 , W/ .050 milling it would bring the number closer to 8.2 -1
My lawn mower has more than that. :shock:
Assuming your doing a complete rebuild, have the block bored/sqaured, and opt for flat tops pistons over OEM replacement slugs.
A competiton valve job (3 angle)
Comp Cams XE274H or XE262H would be good cam choices
Edlebrock performer rpm/ or performer RPM air gap intake
750 CFM holley Dp or equivelant carb
Headers > W/free flowing muffs & exhaust
373's gear in the rear & 2500 converter
Goodluck, Cp
Thanks for the info. I had heard that the low compression would be a problem. I will have the heads milled and a good 3 angle done on them. I have been looking at some I beam rods and Trw flat tops from Butlers. The guy that builds my dirt track race engines said he had some good info on porting pontiac heads so we may do a port job on them as well. Again Thanks for the info.