What size is the tbody inlet?

[fordracer666]

Looking to replace the rubber adapter that goes to the tbody from my 3" intercooler pipe . So what size does it need to be on tbody side.
I have a bbk tbody if that makes a difference. 3 valve motor .

 

[702GT]

If I remember right, the BBK is a twin 60mm, same as the GT500. The GT500 takes a 5" coupler to fit perfect. I think that coupler size is a common issue if you do a search. You should be able to stretch a 4-1/2" coupler. I think 4-1/2 x 3 is the best size you'll find.