Well, things just get better. A fellow inmate offered to sell me a 93 500 that's been ported and polished for $500. As I was looking for a CR125 or 250 on craigslist this morning to slap another 500 engine in I ran across a Gen 1 99 250 that had already been converted. The guy had pulled the 500 motor to put in a Gen 4 frame. I bought the complete roller for $700.
Now I'll have a runner by this weekend to ride while I build the Gen 4 frame. At the end the p/p motor will go in the new frame and the other motor will go in the old frame and go on the block. Score!!!!