8.25 rebuild - Any tech advice?

I am finally getting ready to rebuild and upgrade the 8.25 in the Dart. Below is a list of what I am already planning to do to it (don't talk me out of it, I already have the parts).

I have never worked on a car rear end (just big stuff on Class 8 trucks) but the theory is the same. Also, a buddy is helping me who use to work at a dealer and knows 8.25s and 9.25s very well.

My plans:

Jeep GC disc brake upgrade (along with 11.75 front disk upgrade)
Post-'97 factory Suregrip (29 spline)
New axles to go with the new Suregrip
LPW Diff Girdle Cover
Stud the Carrier caps
3.55 gears
Motive Gear axle rebuild kit

I know the new Suregrip is 29 spline versus the factory 27 my car currently has. However, my car has 2.45s so getting a carrier was a must in order to change gear ratios. The carrier was brand new from a dealer for $40 (going out of business) so I can justify the cost to get axles made. It also works out because I will get the axles cut with the Jeep GC register hole, eliminating the need to grind out the holes on the Jeep rotors to fit the Dart axles.

I was also thinking about welding up the axle tubes to the carrier housing. Good idea? Bad idea? I have a welder, so it's not a big deal to do.

So, any tips, tricks, suggestions, things to watch out for?

The car is only a 360-ish HP, and even if I upgrade will probably never see more than 400, so I already think I am over-building it.:toothy10: