Chris, I am using one of Quentins new Auto-Clutches. I will be having the tank bung relocated to the rear of the tank instead of the middle, the placement is directly above the throttle and with the taller head I want to make sure there will be no issues. I got UPS confirmation yesterday that my old bike and my new motor shipped and should be here next week. Im very excited about the motor, here is what info I have on it perhaps Q will pop in and give some info I dont have (He built the motor for someone else)...vintage Carter carburetor [Whizzer version] . Needle bearing crankshaft, Whizzer "racing" piston, "custom" made wrist pin, Hi compression head [re-worked & milled], "H" crankcase with a ported "300" series cylinder [with larger valves], aluminum "300" exhaust manifold, tall oil breather [allows 8 oz. oil in crankcase], .193" lift camshaft, copper head gasket, electronic ignition module, crankshaft seal, left side crankshaft bearing, right side needle bearing [in the side cover], and all new gaskets. The motor has been boxed since he built it.