rear disc brake /c-clip eliminator

[stang911]

Hello, I'm in the rear axle beefing up process and I need some advise concerning the following:

I would like to replace stock axle with Moser 31 spline for durability, at the same time I'm looking for a rear disc brake upgrade ( 90 5.0 lx) I thinks Lincoln part can be used but I'm not sure can somebody help with that or should I stick with a conversion kit like those from ssbrake?

If I'M right I also need c-clip eliminator for car runing under 11.99, is those fit with disc brake?

Last thinks, I'm sure this have been discussed a lot in the past, it is concerning locker / limited slip diff. The car will be used on the street and on the track, I'm concidering Auburn pro locker or Powertrax lock right. Any other idea?

Thanks

Stang911