1972 XA FALCON GT HO LOT 6 FACTORY SVO RACING PROTOTYPES were never to have a 4 BOLT main MOTOR for the BATHURST 1972 RACE had it proceeded with the Axed HO 4 according to historical statements XA 2 & XA 3 had the 4 Bolt theFACT is these two HO 4 cars were converted to rally spec before Rally aces Bruce Hodgson & Keith Goodall received the supercars The CAMS letter agreed to include a 4 bolt as a variant in time for Sandown & Bathurst 1st September 1974 -1972 HO 4 that is 2 years+ later