the big carb can work if tune in but just for a driver the small carb will work better .i have had very good luck with the afbs carter / edlebrocks i see this has how much farting around you want to do with your carb you have on it now at w.o.t this would be a good carb tune in . but if you are driving it and not looking for the max out of your com then small afb would work very good i have done this with a holley on a big block vett it was over carb for the rpm of the engine