Rear end experts

So, the shop notified me the rear end on the 69 Plymouth Suburban Wagon with 383 is worn out. I plan on taking advantage of the circumstances to rebuild the open to a closed differential. From what I've read the Auburn Part #542051 and Eaton Posi products are pretty similar in both use a clutch pack. The Eaton posi however is rebuildable, Auburn is not. However there is also the Detroit Truetrac which uses a helical gear setup to perform the same task, and is not rebuildable. Shop suggest,...

Rear end experts
Author: Wonderwagon