In addition to these changes, the Valencia featured a new transmission flange to suit the BC4/5 transaxle and the cylinder head redesigned using flat-top pistons and the traditional combustion chamber in the head. Another key difference from the 71M Crossflow block is the absence of mounting spigots cast into the side faces, therefore the Valencia (and the later HCS and Endura-E versions) cannot be mounted in a longitudinal application - when installed in a Fiesta/Escort III/Orion the unit relies on the transaxle mountings for lateral location in the vehicle.