Any one know where on the net

[Frank-id]

GM part numbers can be found. My son in law is restoring a '69 Camaro. While gathering some 4 speed parts, the bell housings does fit the engine, while using Chevy parts. The clutch/pressure plate assembly will not allow the bell housing to be bolted onto engine. He has found 3 aluminium housings and none will fit. The engine is a 350 sb and plans to use a muncie 4 gear, all factory parts. Are there different bell housings for small block engines. The p-plate is the 11 inch style.