▁original ▁series ▁spons or ▁A CL ▁( Autom ot ive ▁Com ponents ▁Limited ). ▁ ▁Second - hand ▁Formula ▁ 3 0 0 0 ▁ch ass is ▁were ▁target ed ▁immediately ▁as ▁a ▁cheap ▁source ▁of ▁cars ▁in ▁addition ▁to ▁local ▁construct ors , ▁and ▁under ▁CA MS ▁rules , ▁all ▁cars ▁had ▁to ▁be ▁at ▁least ▁one ▁year ▁old . ▁Formula ▁Hold en ▁also ▁used ▁a ▁Dun lop ▁control ▁ty re ▁in ▁its ▁early ▁years . ▁For ▁the ▁ 1 9 9 2 ▁season ▁cars ▁constructed ▁from ▁carbon ▁fib re ▁were ▁allowed . ▁In ▁ 2 0 0 6 ▁an ▁engine ▁upgrade ▁was ▁made ▁available ▁to ▁the ▁ 3 . 6 ▁lit re ▁Al loy te c ▁V 6 ▁engine , ▁although ▁take - up ▁of ▁the ▁Al loy te c ▁V 6 ▁was ▁far ▁from ▁universal . ▁The ▁engines ▁were ▁usually ▁mounted ▁in ▁ex - ▁Formula ▁ 3 0 0 0 ▁ch ass is , ▁a ▁large ▁number ▁of ▁which ▁were ▁s our ced ▁from ▁the ▁Formula ▁N ipp on ▁championship ▁in ▁Japan , ▁but ▁also ▁included ▁cars ▁from ▁other ▁sources ▁and ▁a ▁few ▁specifically ▁designed ▁for ▁the ▁class , ▁like ▁the ▁Australian ▁designed ▁C heet ah , ▁El fin , ▁Sp a ▁( des igned ▁by ▁F 1 ▁designer ▁Gary ▁Anderson ), ▁and ▁the ▁Sh rike ▁cars ▁which ▁were ▁designed ▁and ▁built ▁by ▁technical ▁students ▁at ▁the ▁Cro yd on ▁Park ▁Institute ▁of ▁T AF E ▁in ▁Ad ela ide . ▁ ▁Formula ▁Hold en ▁was ▁in ▁ess ence ▁a