Make sure you're using a good set of converter bolts. NOT the Mopar Performance bolts. Get a set of the 12 point ARP converter bolts. Use red loctite on them. Spray the threads in the converter out w/ brake clean to make sure there's no grease or oil in them.
Something out of balance will cause them to loosen...as well as detonation.
CHIP
'70 hemicuda, 575" Hemi, 727, Dana 60
'69 road runner, 440-6, 18 spline 4 speed, Dana 60
'71 Demon, 340, low gear 904, 8.75
'73 Chrysler New Yorker, 440, 727, 8.75
'90 Chevy 454SS Silverado, 476" BBC, TH400, 14 bolt
'06 GMC 2500HD LBZ Duramax
| 
