Yes, it's a 55 TO35. Looks to be all there, just waiting for some TLC!
Before trying to start it, give each cylinder a squirt of oil, the rings are dry.
You can jump it with 12 volts for the initial start up. Just don't leave the ignition on between trys, and don't marathon crank on it.
I would not change any oils yet. Just crack the drain plugs on the engine and cases, let any water out, and check the engine oil level.
If you change the oil now, you will just loose it, or have to try to keep it in something and keep it clean.
Try to get it running, take it for a run, listen and look for problems. You want to get a game plan, fix everything at once so you don't have to go back in.
A shop manual is a good investment.
Keep in touch, ask all the questions you want, we.re here to help!