A family mechanic suggested I would want a carburetor with small primaries and large primaries. He is a fan of the quadrajet and worked on many in his day. His preference was Edelbrock and I haven’t looked into that carb yet. Fuel economy for cruising and fouled plugs was a theme for my situation in his mind. I’m looking to go to a 650 carb from the 750 Holley currently on the car. The local mechanic said it was too large for the car. No choke being one of the problems. Looking for suggestions on the primaries and brand to consider.