I would guess a very late 70 car, as the 71 cars got the track-lock?

My dana 60 is a late 70A axle but has the track lock in there, 603226-4 is an E-body 4.10.

8 12 dana 60 axle info.jpg
Last edited by Gtxxjon; 01/09/22 08:01 AM.
Carpe diem, quam minimum credula postero, thanx Horace!

There’s no point trying to fix stuff that ain’t broke,,, 'but if ain’t broke',,, you is not trying hard enough...