If you can find some jeep 6.1 manifolds, you can use those and save some coin. Also a Milodon oil pan is $200 which will save $200. I'm not positive, but you may be able to use the stock wiring harness, but I'm not 100% positive on that. If you can that will save some as well. Make sure you get as mush as possible with the engine (gas pedal, wiring, accessories, etc).

For the trans you'll need the MP flex plate (P5153753) other then that the trans will bolt up just fine. I think you'll need to use a mini starter that fits the 727, just like if you were running a small block.