Trying to figure out what specifically this is...

Case itself has 8x15x67 on the top
then E 3
and C 97622

The Pad stamp is:
8A138232 (lynch Rd car)
PP 833 2239 0027

Tail shaft housing
C-00539
SS 2

Shift link cover
C- 95664 Z
5x8
4


Didn't count, but looked like a 18 spline unit

1966 383, 4-sp Charger 38yrs
1970 440+6, 4-sp Road Runner 36yrs
1974 360, auto Challenger 25yrs,in Family 41yrs
2003 Ram 2500 QCLB 4x4 Cummins HO
2010 5.7L R/T 6sp Challenger - Mopar10
2018 392 Daytona Charger