I have a '78 chevy 350 bored .030 over, cammed up, headers, and a edelbrock highrise intake. Right now i have an economy Holley 600 on it. Am i under-carbed? I was thinking about going to something bigger, like a Street Preformer in the 800 CFM range. Would i get significant preformance upgrades by making this shift? What would be the best carb to use if i just want an overall good preformance?

 

LOL, its difficult to under-carb a 350, unless you have an old ****** one barrel on there. Your holley 600 will work fine, and achive numbers close to if not meeting the numbers of a larger carb (Hp & Torque) Just tune it properly for the engine, and if you have the hood clearence, a 1" spacer with a 4 into 1 graduated design.