If it helps, the 4 1/8" base fits early AFB's (400 or 500 CFM varieties) and 2 BBL Holley 2210/2245's. If you have a 2BBL mopar between the years of 1971 - 1978 with a 360 or 400 it would take this air cleaner. Solid work by 340wedge1971.
I believe the Carter 2BBL's are too small.