I have a 350 that I bought new in 2004. It's been a great saw and ill never get rid of it. It's my primary firewood saw right now (currently searching for something a little bigger) that i cut about 15 to 20 face cords with a year. It's all original including the bar, but I take care of it like its my baby. It's sitting in the barn right now with empty tanks, new fuel line and filter, new air filter, new plug, freshly painted bar and new oem chain. Ready to go into the woods at a moments notice. It's been rock solid reliable and its nimble in the handling department. I think it's worth rebuilding but i don't know anything about the crankcase or cylinder on this model, someone else on here knows more I'm sure.
P.S. - hi Scott in Penfield! You're about 30 min from me (Bristol).