Craigslist 4 Speed - Something doesn't jive?

I think the tail housings are different on the GM.
The diagram I posted previously compares the A Body and the E Body mount locations. The older B did not have the rear E location.
From BBD........."A/F-body 4 speeds have only one shifter pad. The 1964-1969 B/C-body A-833s place the shifter pad ahead of the cross member mount flange, and the 1970-74 B/E-body long tail housing four speed has two shifter pads, one ahead of the cross member mount flange (for B-bodies), and one behind the cross member mount flange at the very end of the longer B/E tailshaft housing (this position is used in E-bodies)."

Brewer's Performance - Mopar A833 4-Speed Transmission and Component Specialists