I was going to change out my edelbrock 600 with a holley 650 but I have a performer intake and dont think they will match up,can I buy an adapter or do I have to buy an edelbrock 650 which will cost more money.

ok unless edelbrock made the manifold with only one set of bolt holes on the carb pad then you can use a holley, theyve always been pretty good about making manifolds to accept spread and square bore carbs. go on theyre website, find your intake and look at the specs, if it says it can accept square bore then great. if not, i believe they do make an adapter, mr. gasket probably does too. i dont blame you for switching to holley, edelbrock sucks.