Kurt ...Im just going by a 62-76 Parts book published by GM. They list a 3:73 for a 69 Camaro as code BU and on later built 69 Camaros QX there is no C listed prior to any of the 2 letter 69 Camaro codes. I guess even GM makes mistakes too. I feel that if you wanted a lower gear on a 1970 Nova other than 3:55 you could get one if you hit the right channels. On the L89 deal it is possible but not probable. I feel that small dealers like Yenko and Gibb could order special requests why other dealers who sold larger volumes could not get any small requests. I say Never say Never.