have a 1993 dodge pickup,cummins motor.getrag 360 trans,trans needed bearings,truck has 288,000 miles,im only owner,it does pull a gooseneck trailer.while have the trans out I pulled the clutch to have a look,it looks very good,flywheel and p-p look good,are flat to(inked them on a surface plate).how much material is on a new clutch above the rivet heads,my grooves are all visible,i have .040 above rivits on all rivits too.ive called half dozen places to purchase the disc only and they all say it only comes in a kit with p-p and throwout bearing,i cant find anyplace to reline it either.there was no problem with it,just while the trans and transfer case are down thought ide take a look,is .040 a good number ?,if not whats a new disc ??