63 differential re-build kits

I want to buy a kit to re-condition my non-posi differential. It didn't have any problems( noises, leaks, etc.) when I put it into storage. I am finding
different kits/ prices and could use some guidance. Here are 3 that I'm looking at; Ikerds.com,#200-085 Master rebuild kit-$150, Ecklers #A7148- $140, EBay item# 4577173888-$75. I'd appreciate any knowledge to share about this task. Thanx- lib
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