A cam plane is defined perpendicular to {HEAD ~ the longitudinal axis} and disposed between {TAIL ~ the open ends} of the cylinders and a second end of the engine housing 
A cam plane is defined perpendicular to { HEAD ~ the longitudinal axis } and disposed between { TAIL ~ the open ends } of the cylinders and a second end of the engine housing
OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH