Barracuda 273 9.5 inch clutch

So if this is true:

The '70's and '80's van slant 6 clutch is a bolt-in. You just need to round up a set of grade 8 allen head bolts for the pressure plate.

What parts are "bolt in". Which ones do I need from the 1970-80's van just the pressure plate and flywheel or do I need to bell housing, linkage, z-bar, etc