this horse has been beat to death , but------
Not sure but think this may be what you are referencing:
Mancini Racing Billet Rear Main Seal Retainer
"Fits: Big Block, Mopar
Billet aluminum rear main retainer. It uses double o-ring on each end to seal the cap to the block. This retainer is designed to hold the proper diameter to clamp the rear main seal properly.
Sold in kit form with Cap, 4-O-ring seals, Rear main seal, 2 - alignment pins for easy installation and socket head bolts"
Not sure but think this may be what you are referencing:
Mancini Racing Billet Rear Main Seal Retainer
"Fits: Big Block, Mopar
Billet aluminum rear main retainer. It uses double o-ring on each end to seal the cap to the block. This retainer is designed to hold the proper diameter to clamp the rear main seal properly.
Sold in kit form with Cap, 4-O-ring seals, Rear main seal, 2 - alignment pins for easy installation and socket head bolts"
