▁ ▁There ▁were ▁a ▁total ▁of ▁ 9 2 ▁Hur st / Old s ▁Par ade ▁cars . ▁▁ 1 9 7 5 ▁The ▁Hur st / Old s ▁in ▁ 1 9 7 5 ▁was ▁the ▁first ▁General ▁Mot ors ▁car ▁to ▁have ▁" H urst / H atch " ▁remov able ▁T - Top ▁style ▁roof ▁installed . ▁The ▁car ▁is ▁based ▁on ▁the ▁formal - ro of ed ▁ ▁C ut lass ▁Supreme ▁cou pe ▁rather ▁than ▁the ▁semi - fast back ▁C ut lass ▁S ▁used ▁in ▁ 1 9 7 3 - 7 4 . ▁The ▁car ▁was ▁available ▁in ▁either ▁black ▁or ▁white , ▁with ▁either ▁a ▁black ▁or ▁white ▁half ▁vin yl ▁top ▁offset ▁by ▁a ▁wide ▁al umin um ▁band . ▁Either ▁a ▁W - 2 5 , ▁equ ipped ▁with ▁an ▁Old sm obile ▁ 3 5 0 ▁engine , ▁or ▁a ▁W - 3 0 , ▁equ ipped ▁with ▁an ▁Old sm obile ▁ 4 5 5 ▁engine ▁could ▁be ▁had . ▁Due ▁the ▁environmental ▁reg ulations ▁at ▁the ▁time , ▁this ▁was ▁the ▁first ▁year ▁that ▁the ▁United ▁States ▁Environment al ▁Prote ction ▁Agency ▁mand ated ▁the ▁addition ▁of ▁catal yt ic ▁conver ters ▁mounted ▁in ▁the ▁exhaust ▁system . ▁Due ▁to ▁the ▁added ▁exp ense , ▁only ▁single ▁exhaust ▁was ▁available . ▁ ▁The ▁h ood ▁from ▁the ▁ 1 9 7 4 ▁Hur st / Old s , ▁with ▁the ▁center ▁mounted ▁l ou vers , ▁carried ▁over . ▁Gold