M104 in W111

[SwissCheese]

My Goal is to swap a 3.2L M104 into my fintail. I have not done any engine swaps so far, so I need a bit (a lot) help.

My thought is I need spare 320, either a R129 or W124. I will take out the engine and wiring harness. Then I would like to manual swap the M104. For the engine management I will go with Megasquirt, since its cheap and easy.

So what I would need is a parts car, manual transmission plus adapter, custom driveshaft, motor/ transmission mount and exhaust, correct?
What manual transmission would work, I know the dogleg would fit right up w/o any modification, but they are difficult to find (and expensive).

Any help appreciated, Thanks

My fintail is already manual, so I do not need any pedals, etc.