es , ▁with ▁whom ▁he ▁had ▁developed ▁a ▁close ▁working ▁relationship ▁from ▁the ▁early ▁ 1 9 6 0 s . ▁Since ▁Hay es ▁had ▁joined ▁Ford ▁in ▁ 1 9 6 2 ▁the ▁pair ▁had ▁previously ▁collabor ated ▁in ▁the ▁production ▁of ▁the ▁successful ▁Lot us ▁Cort ina , ▁introduced ▁in ▁ 1 9 6 3 . ▁Hay es ▁arranged ▁dinner ▁for ▁Chap man ▁with ▁Ford ▁employee ▁Har ley ▁Co pp , ▁a ▁British - based ▁American ▁engineer ▁who ▁had ▁back ed ▁and ▁engine ered ▁Ford ' s ▁successful ▁entry ▁into ▁NAS C AR ▁in ▁the ▁ 1 9 5 0 s . ▁Hay es ▁and ▁Co pp ▁developed ▁a ▁business ▁plan , ▁which ▁was ▁back ed ▁by ▁Ford ▁UK ' s ▁new ▁chairman ▁Stanley ▁Gill en , ▁and ▁approved ▁by ▁Ford ' s ▁Detroit ▁head ▁office ▁as ▁a ▁two - part ▁plan : ▁ ▁Stage ▁one ▁would ▁produce ▁a ▁four - cy l inder ▁tw in - cam ▁engine ▁for ▁Formula ▁Two ▁Stage ▁two ▁would ▁produce ▁a ▁V 8 ▁engine ▁for ▁Formula ▁One , ▁by ▁May ▁ 1 9 6 7 ▁ ▁Formula ▁One ▁The ▁project ▁was ▁revealed ▁by ▁Hay es ▁in ▁a ▁PR ▁launch ▁in ▁Detroit ▁at ▁the ▁end ▁of ▁ 1 9 6 5 , ▁but ▁the ▁engine ▁was ▁not ▁ready ▁until ▁the ▁third ▁race ▁of ▁the ▁ 1 9 6 7 ▁season , ▁on ▁the ▁ 4 ▁June ▁at ▁Z and vo ort . ▁ ▁Its ▁debut ▁proved ▁successful . ▁Graham ▁Hill , ▁who ▁was ▁in ▁the ▁team