So cal diesel 7 liter duramax engine with wherlly fab triple turbo/triple CP3 kit.
DT466 block with a DT540 kit in it. Again triple turbo and a maxed out P7100 injection pump.
Both will fit, both capable of making 1,500-2K horse power. But when the boost comes on, the trans is not going to survive to long, even being made of unobtainium. And that shock load travels all the way to the tires. Keeping it 6x6 just adds to the price. Basically what your asking for is a diesel funny car engine/national level diesel sled puller engine and transmission to not only survive that kind of abuse, but for 2-3 mins long with little to no air flow and/or very slow ground speed.