One of my reasons for upgrading to the M42 a few years ago was that I could conceivably replace an M42 a lot easier than an M10 and for considerably less money. I hadn't planned on having to replace the engine so soon, but it was a lot easier the second time.
Picking up where I left off, I bolted up a few more parts to the M42 before installation. These included the upper and lower intake manifolds, oil filter mount, the wiring harness, and the A/C compressor mount (not that I have A/C....yet).
Then I bolted up the transmission. This was decidedly easier than wrestling it into position from under the car.
Then I bolted the subframe to the engine, while still on the crane. Next, I dropped it to the ground, slid it under the engine bay and lifted it up through the engine bay. This was easily the smoothest and quickest engine install that I've ever done.
I still have to hook all the wiring, plumbing and accessories up, but this is progress.