[Tim Brewer]

Hey Michael. you said your bell housing slipped right on? They ALL bolt up to the block. The allignment process is alligning the center of the bell housing with the center of your crank. You want to have a perfect straight line from the front of your crank to the rear of your transmission. This is either done by offset dowel pins or by drilling out the bell housing mounting holes and welding a spacer (kinda like a bung) over the old hole to make a new hole that will allign the bell housing. I would venture to say that NO aftermarket bellhousing is correct.
Tim