said internal combustion engine is an overhead valve type engine and {HEAD ~ a combustion chamber} of {TAIL ~ said engine} is interchangeable among a pan cake shaped, semi spherical shaped, bath tub shaped, and wedge shaped combustion chamber 
of
said internal combustion engine is an overhead valve type engine and { HEAD ~ a combustion chamber } of { TAIL ~ said engine } is interchangeable among a pan cake shaped , semi spherical shaped , bath tub shaped , and wedge shaped combustion chamber
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH