A few things I would add:
1. Make sure your battery cables are in good shape and of the correct gauge.
2. Don't forget the engine ground strap and make sure it has a good connection.
3. Use new engine and transmission mounts.
4. Top off the steering knuckles now. It is easier to do with the engine out of the way.
5. Check/rebuild your steering components while the engine is out.
6. Make sure you have plenty of patience when you get your motor in and realize you forgot the throttle linkage..
