Help needed: swapping out 292 for a V-8 in a 4x4

[69BBsuburban]

Tech question here, not sure if I should post this in the engine, 4x4, or this section....but here it goes....
Have a '69 Suburban 1/2T 4x4 with a 292. I pulled the 292 out, going to get a Big Block.....anyway, the crossmember is angled as the motor mounts are off-set. See pics.....that's a spare 454 block I had laying around for mock-up. The driver's side pretty much lines up, although once heads and V/C's are on it I think it'd be a tight fit.
What stuff do I need to swap in the V-8? Are all 4x4 V-8 crossmembers the same??? I assume I'll need motor mounts/towers as well.

Any help with this greatly appreciated!!!
I plan on getting the parts ASAP....