90* 3.8/4.3 bellhousing from a Astro Van, it'll be canted 17* to match the trans, disc to match the trans, pressure plate to match the flywheel, it "should" be a 153 tooth. Try to go hydraulic for the T.O.B. It's been a while, but that should be the correct combo.
2.8 was a 60* V6. Totally different block pattern.