Carbureted LSX forum - ls1 850 or 950

have 5.7with 243 heads comp cam275 566/569 can i use holly 95o on mostly stock engine 3ooo lbs 77 nova

Might be a little big for your engine. You may have better luck with a 750.

I have a 5.7 with ported 862 heads w/ 230/230 612 lift & it has a 750 DP on it, runs perfect.

If that s the only choice. the 850, otherwise, a 750 DP would get my vote if it is a street car or not.