A bit more progress today: alternator and pulleys are on. It's looking more and more like a complete engine.

I went with INA pulleys/tensioner, and reused the alternator (after a generous hosing with Electromotive to clean off the built-up dirt/dust/"gunk." The water pump pulley is an ECS metal one that I've had sitting around for a few years. I probably purchased it when it was offered at a discount, can't remember. Originally, I was going to put it on my '01 330i, but for some reason decided the original plastic one was still good. Now it's getting put to good use. The plastic parts are still okay, in my opinion, but since I had it laying around I figured "why not."

The sharpie marks on the nuts and bolts are just for my reference, indicating that it's been torqued appropriately.