The tranny is a 833 OD , flywheel is nos for 360 clutch is centerforce diafram type. I tried backing off rear brakes no real diff. It's one of those things you'd have to feel to truely understand. Just don't know .
Is the clutch new? People have been having issues with Centerforce clutches lately right here on this forum. I don't think it was specifically what you're experiencing, but there have been issues. I've never liked them. I've seen them weights fly off and cause all kinda mayhem, seen them chatter too......going forward. Who knows? I don't think it's your pinion angle UNLESS you are telling us incorrectly and it is SO FAR out that that's what's causing it.