John and Ron have built many of those 350`s, they are not my forte as far as saws go. I did rebuild a nice 349 that was riddled with problems from new, it made a real nice saw once properly running with a muffler mod.I may be picking yours and Rons brains some more. Along with every body else. Working on the 350 soon and lots of info on rebuilds and things of that nature are gone from the site. Was trying to find the average stock squish with a gasket last night and no joy.