Carb CFM recommendations

The 600 Edelbrock is a great carb, but you might like to know that the 650AVS2 has the same primary size as the 600, but when you need it the secondaries are larger (same as the 800) but will only supply what the motor wants. And the AVS2 has annular boosters for better throttle response.

I have run all 3 but really like the 650 AVS2! Square bore pattern but really a spread bore design.