The brake mounting holder welded to the tube told me it was '76-newer. But, they re-used the old brake lines. And maybe the old pinion yoke.
Tips were probably bought thru the dealership as exhaust has been replaced.
Taken from this thread is usually what happens to the rear, requiring replacement.
http://www.forums.maxperformanceinc....d.php?t=433662
Your stamping on the Posi unit looks to have been assembled on Jan. 9th, 1975, 1st shift. And here is what numbers to look for...
