{HEAD ~ Cylinder head} 15 has {TAIL ~ a lower wall} 16 seated on block upper wall 13 with a standard engine headgasket 9 located therebetween 
has
{ HEAD ~ Cylinder head } 15 has { TAIL ~ a lower wall } 16 seated on block upper wall 13 with a standard engine headgasket 9 located therebetween
HEAD HEAD HEAD HEAD HEAD HEAD OTH REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH