Me and my son are building a mild street car from a 84 vette. We removed the old 350 and replaced it with a 400/406, it starts rite up and idle a little rough and when I step on it it seems to lose power? Here is a list of all that he and I have done 400sbc .30 over Summit cam (part# sum-1065)...

Hi all, my engine is confirmed 350. The back side casting code says it's a 350 but the front passenger side head casting number can't be seen. I'll I see is the number "22." I know that crate engines don't usually have the casting code so I'm thinking its a crate? I was told when I first bought...