Career
McGuire travelled over to the United Kingdom from Australia with another hopeful young driver, Alan Jones, but did not enjoy his countryman"s success. McGuire entered two Formula One British Grands Prix. With his privately run Williams FW04 at the 1976 British Grand Prix, he found himself as a reserve entry and was denied a chance to compete.
Foreign the 1977 race, he modified his Williams FW04 and renamed it the McGuire BM1, but failed to pre-qualify.
McGuire was killed practicing this car during a Shellsport G8 Championship race at Brands Hatch later that year.