I ended up using the following numbers from blsnelling on arboristsite for this saw from a 2015 thread I believe. Haven't put it together, but it has to be better than it was with the china cylinder at 70 plus thou squish. I could stop 3/8" 20" chain easy in a cut. Hoping it will pull it a little better now. if not, I'll move it to 3/8 LP.
Back to the saw, it's now at under 20 thou squish. And the numbers... 104, 124, 78. I used a 1/4" upcut spiral carbide router bit (Whiteside brand) in a drill with sideways pressure conventional milling to hog out the exhaust a little wider. That thing works awesome. Easy to control (would not try it in a router) and takes off chips instead of dust. I didn't touch the intake port, but did take a little off the bottom of the piston skirt on the intake side to give it a little more intake. I also moved the transfers up a hair (less than they went down by removing squish) to reach 124.
EDIT: I somehow raised the transfers higher than I expected. I put the saw together and transfer is 118 or 119 instead of the 124 I was shooting for. But... it runs great. It was very easy to stall in the cut before. Now it's so powerful, I can hardly stall it with heavy leaing into the dogs.
After the squish and slight porting, I modded the muffler. It made it a little stronger still (checked before and after in the same log). After that I advanced the timing 5 or 6 degrees. I'm not sure how much this affected it. The biggest difference seemed to be moving squish from around 70 thou to around 20 thou.
