welcome, hey the 350's are neat and light, i have a buddy that might sell me his,also a 350,1971 not sure if its an F-model , those motors have roller bearings on the crankshaft ends and needle bearings on the one piece connecting rods same as the honda Rebels 250cc,very unique in motorcyle engines, I am pretty busy working on my 78/750k and have an 05 Rebel,im hooked!! its a disease,got my first bike(rebel) this past summer