Nooc ka sii qallafsan oo weedhan ah dayrta 1963-kii, MacDonald wuxuu noqday qof caan ah ka dib markii uu shan todobaad ku guuleystay tartamada USRRC iyo NASCAR.
Dabcan, nooc ka mid ah jumlada ayaa ah "Bishii dayrta ee 1963, MacDonald wuxuu ku soo kordhay caan qaran ka dib markii uu duuliyay Shelby King Cobra CM / 1/63 si uu ugu guuleysto labada tartan ee ugu waaweyn uguna taajirsan Mareykanka - Los Angeles Times Grand Prix iyo Monterey Pacific Grand Prix. "