Hey guys, real quick question. Currently in my 65 elky, I have a 283 with a Holley Street Avenger 670 sitting on top. When I bought the car from the guy, he said the carb is way to big for the engine and when stomped on, the engine will putter before reving up. He said to find another Street Avenger, but get the 570. It sounds like the 500-600cfm range is good for this engine. I've also heard of some people running the edelbrock 600. Just looking to get some others input before I go about getting another carb so I can get her out on the street for this summer!