Clutch housing bolts?

Kinda depends on the pressure plate.

For sure the shoulder needs to go into the flywheel. If you have what they call the scalloped pressure plate it takes its own bolt. I used to know the part number off the top of my head, but no any more.

I'll grab a bolt for the scalloped plate and take some pictures in a bit and post them. If you have the scalloped plate and don't use the correct bolt (or try studs and nuts) you will fracture the cover. Learned that the hard way.