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: November of 67 KM 4.56 posi? dboz Jul 13th, 07, 8:51 PM I have a 12 bolt rear end dated november of 67 with A body dimensions. It has a KM code which makes it a 4.56 factory posi. Would this have come out of a COPO car or what? It also has an "E" stamped on the flange under the cover? any ideas? dboz Jul 17th, 07, 1:57 PM ttt animal69 Jul 17th, 07, 3:53 PM I believe you could order 4.10 or 4.56 in 1967. I know you could in '69. joe58 Jul 18th, 07, 10:57 AM In 68 4:56 gear was a RPO option In 69 4:56 gear was a COPO option no 427 COPO Chevelle in 68 69 427 COPO Chevelle had KQ 4:10 dboz Jul 18th, 07, 6:46 PM Thanks for the info. | ||