18,000 orig. mile 318 build

Don't think 600 cfm is to big , I used an 850 thermoquad off a 440 and my 318 ran great . All it had was holley intake , heads shaved , headers a with dual exhaust and a mild cam , forget the number . All I can say about the carbs is Holley is super easy to fix side of the road , if it breaks down , TQ not so much , but the TQ is super reliable , never had a problem with mine .