I have GM 1 Tom axles. I've had the axles in before the 3rz. The power increase from The rebuilt motor I had with a cam vs the 3rz was a pretty large difference. It's hard to tell though because the rebuilt motor I had was way more powerful than the old motor but I did new motor and one tons at the same time so it's tough to say how much more power the new motor had than the old. But I can definitely haul ass in places for having a 5500+ lb rig vs some friends I have with much lighter rigs.
No siree. I'll be at my cabin deer hunting.
Lame im actually gonna make it again only took 7 yrs! And with a new rig