14b Detroit s good, but probably not what you want for racing/thrashing. They don't ride on cross pins like a Dana lunchbox locker and are pretty strong. 14b spiders should be able to be found on pirate cheap.
D60 track lock can be welded I think. I have a 35 spline open carrier if you want to swap it out.
Cucv axles go for 1K-1500 on PBB. Hard to get more when the whole trucks go for 2k