350 mains is really big. a friend has ported cylinders, 80 over, vitos high compression pistons, cool head w/19 cc domes, V-force 3 reeds, CPI in frame and his are 320. i was working on a shee and it has 200 mains and it was on the rich side. all that had was fmf pipes. i would let it warm up and take it for a short burn and look at the plugs. if your top end bogs i would say go bigger on the mains but make sure its warmed up. it can bog if its cold. if you have questions about your shee PM me. after i post 5 or so more times i`ll lose your link. what part of PA are you from?