This is of course my opinion but you should definitely go solid axle! If you're gonna be spending the cash you might as well do it right

Not to get in a big argument with everyone else, but you should check out all of the larger solid axle swaps on here. Sure, the Dana 30 or 35 "might" be strong enough, but if you're gonna be spending those amounts and doing that much work you might as well go big or go home. What is this garbage about "strong enough?" You want it overly strong
A few builds to check out: Josh40601, Bray D, PlumCrazy, Wahlstrom1 and a few others. All very awesome.
(Now I'll duck for cover as I receive flak for that response)