Pm'd about rail.
I may be overthinking it, I definitely don't want to under-think stuff and have to redo it later, I want overkill built into everything.
I'm pretty sure you don't "just redrill for Volvo bolt pattern" on the 8.8, you have to find one in good shape with the correct ratio in it, cut one side down, order the proper axle which could have the correct pattern so might as well order 2, buy and install the Wavetrac, make mounts, and that's just the stuff I've read, there is probably something I don't know yet.
8.8 is probably the way to go cost wise, and people put a lotta power through them, I guess I should do more research. My neighbor has what I think is an 8.8 he said I could have for free, I gotta figure out exactly what its is.