NP205 and SM465 rebuild/reseal kits

[zac]

I’m redoing a ‘70 K10 suburban. Nothing special, weekend driver, no real off roading, stockish engine. Trans and transfer case work fine, leaky. I have a spare of each that are in the same condition from a ‘72 that I was going to redo and swap in. Wondering where you recommend buying kits for them from. I see them on ebay and lots of other places but assume the quality varies widely. And should I buy a full blown rebuild kit with bearings, or just get a seal kit and replace what needs replacement. I assume there are things that wear out and things that last forever. I know the 10 spline output shaft on both my 465s are worn. Thanks in advance.