An engine assembly may include {TAIL ~ an engine structure} and a camshaft supported on {HEAD ~ the engine structure} 
An engine assembly may include { TAIL ~ an engine structure } and a camshaft supported on { HEAD ~ the engine structure }
OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD