MSD dizzy going in tonight - any hints/tips/things to look out for

Like you said, not much to it.

I was a bit paranoid when I swapped mine. I marked the location of these three things, and it got my timing almost right:

1. direction of the #1 spark plug wire on the cap (keeps current timing)
2. direction of the rotor BEFORE removing the distributor
3. direction of the rotor AFTER removing the distributor
4. after installation, set your timing.

Both #2 and #3 verified to me that the rotor and gear were in about the right place. Technically, you only need to do #3.

And that's it. It takes a bit of wiggling to get the new distributor to slide in, and it took me a few tries to get the rotor pointing the right way. In my case, the rotor wouldn't point exactly in the right direction. I got it as close as possible, and set the timing.