My son has a 78 Matador with a stock 360. The car is his daily driver, and has about 60,000 miles. He's wanting to replace the carburetor with a 4 barrel. I plan to use an Edelbrock SP2P intake that I already have on hand. My question is what size carb should I go with? Would a 600 cfm be too much? I'm thinking maybe I should use a 500 cfm. Suggestions? Thanks, Todd