I bought a moser 35 spline bolt in unit. And yes it bolted right up no issues.
I know the 12 bolt guys love to tell you how great they work and it only broke once
.. But if you add up the cost to build it once and the fix it you could have bought a much stronger rear diff unit.
I have run 12 bolts and have had decent luck broke some others I did not. But I hate doing stuff twice. Lifetime warranty of the wave trac unit rated to handle 1500+ and cost was not to bad I do not recall the price but look it up on the site.
I leave now at 3750 on the cushion ( it will go 4100 on the vert) on the brake and hit the first gun for 100 ( tuning) dead out the hole and the next kit is coming on shortly after