Hi
I'd like get an open air cleaner for my 5.0 TBI, and i'm not sure about the mounting flange size... i mean the diameter of the TBI unit.. i wanna buy it from summit, and they have these options ( i understand TBI is the same as 4bbl) - 5 1/8 in. diameter, 7 5/16 in. diameter, 4 7/32 in. diameter . Which one is it?
I can't check it out by myself cause my car is 1500miles away so thx for the info

 

It's 5 1/8". Most air cleaners out there have 5 1/8" diameter mounting flanges, so it shouldn't be any problem getting an aftermarket air cleaner to fit.