Stop in for a cup of coffee

dartnabout said
Hey I have a question. What bell housing do I need to match up a big Block to the 4 sp OD transmission. Hops said I need to put a 440 or a 383 in my 85 truck

you are going to have to make one because an OD was never available behind a BB from the factory

So either bore out a regular bell or turn a retainer down.

I have seen people turn the retainer down to 4.3" and some bells already have that size ...particularly with 11 inch clutches (143 tooth)