'69 Rear Diff and Trans

I'm planning to replace my rear diff and trans and wanted some advise.
 
For the rear diff what is best.....GM 12 bolt or a 12 bolt from Moser, Strange etc?
 
For the trans I want to go with TH400 but do I buy a unit from GM or go with a unit from TCI or B & M, etc?
 
I want what is the strongest and will hold up in the long haul.
 
Thanks!

I think any 12 bolt will be about the same,
 
Check out summitracing.com they sell complete kits i belive.
 
As for a tranny, what engine you running?

I plan to install a ZZ572 crate motor if it will fit so about 620hp with TH400.
 
Any reco on TH400......GM or TCI or B & M?
 
Thanks!