Well everybody, I have some good news and some bad news. The bad news is that after replacing the fuel filter, making sure the pump was functioning properly, and everything was sparking correctly, the final diagnosis is that the engine threw a rod (or something like that, if I can decipher mechanic code well enough). There was a beautiful hole in the side of the engine where it had knocked out a chunk about the size of a nickle.
The good news is that the same day I was able to find a completely rebuilt 22re from a highly recommended builder with a generous warranty not too far from home. Picked it up yesterday, and dropped it off at the mechanic today. the real good news is that I am going ahead and doing this, getting a fresh engine, before ever really hitting the road. This could have been really bad if I got stranded 200 miles out from a city instead of 5 miles from my mechanic's shop. The price was 1180 for the rebuilt engine, and 1160 for the labor, chemicals, and a few miscellaneous parts. Should be ready early next week.
I am certainly sad to see so much of my budget ($3000) for restoration go to one item, but like I said, I'm glad it happened when it did instead of in a really inconvenient, or dangerous location. Thank you to everyone that pitched in their 2 cents and gave advice. Even though the fuel pump or filter would have been a nice easy fix, I at least know now that those are fully functioning and clean. Hopefully my next post will be in the trip reports section, here's to hoping.