I really don't know what could be more "reliable" than the clutch style sure-grip unit. I have had them in Dana rears and 8 3/4 rears on the track and street with zero issues. If they do happen to wear out you can rebuild it shruggy No downside at all IMHO
Gus beer

64 Plymouth Savoy
493 Indy EZ's by Nick at Compu-Flow
5-Speed Richmond faceplate Liberty box
Dana 60