Off TrackFormula 5000 & InvitedFormula FordGroup Sa 2001cc & Over, Sb, ScGroup Nb >4501cc  & Nc>2001ccGroups J, K, Lb & Invited SaGroups A & CMG & Invited British Sports CarsGroups M,O, FVee & FJP, Q, R Racing Q & R SportsGrp Nb< 4500cc & Nc<2000ccSports SedansRegularity