Call brewers and tell them your combination. The 10" clutch on a 9 1/2" flywheel is ok. It works well but your aluminum bell housing is designed for a 10 1/2 and 11" flywheel/clutch set up and you have a mis-match of parts. They should be able to help you. This ain't their first rodeo. LOL
They don't make a 10-1/2 and 11 " combo for slant sixes. Except for maybe the granny gear 4 speed apps in trucks, but thats a different tranny and bellhousing that won't fit in a car.
Frankly, you need to get rid of that 10" bb unit and either step down to a 9 inch or have your flywheel redrilled for a 10" plate from the ford 4.0 liter. The 10 inch bb has a tendency to develope stress cracks around the flange where it bolts to the flywheel and they eventually explode at high rpm.
