, ▁( a ▁re work ed ▁Op el ▁K ad ett ▁featuring ▁' D ro ops no ot ' ▁sty ling ▁and ▁an ▁initially ▁unique ▁h atch back ▁bod yst yle ▁option ), ▁and ▁the ▁Caval ier , ▁a ▁similarly ▁rest y led ▁As con a . ▁By ▁the ▁end ▁of ▁the ▁ 1 9 7 0 s ▁most ▁V aux h alls ▁were ▁based ▁on ▁Op el ▁designs . ▁The ▁Che v ette , ▁Caval ier ▁and ▁Carl ton ▁were ▁rest y led ▁versions ▁of ▁the ▁K ad ett , ▁As con a ▁and ▁Re kord ▁respectively , ▁all ▁featuring ▁the ▁distinct ive ▁s lop ing ▁' D ro ops no ot ' ▁front ▁end ▁first ▁pro tot yp ed ▁on ▁the ▁H PF ▁Fir enza , ▁with ▁V aux hall ▁engines ▁preserved ▁in ▁the ▁form ▁of ▁the ▁V iva - s our ced ▁ 1 2 5 6 ▁unit ▁fitted ▁to ▁the ▁Che v ette ▁and ▁Caval ier , ▁and ▁the ▁much ▁larger ▁ 2 2 7 9 cc ▁sl ant - four ▁for ▁the ▁hom olog ation - special ▁Che v ette ▁H S . ▁However ▁the ▁Vic ero y ▁and ▁Roy ale ▁were ▁simply ▁re bad ged ▁versions ▁of ▁Op el ' s ▁Op el ▁Com mod ore ▁C ▁and ▁Senator , ▁imported ▁from ▁Germany . ▁These ▁were ▁also ▁sold ▁in ▁left ▁hand ▁drive ▁in ▁contin ental ▁European ▁mark ets , ▁including ▁the ▁Netherlands , ▁Belg ium , ▁the ▁Sc and in av ian ▁countries , ▁Italy ▁and ▁Portugal