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rear end code?

636 Views 4 Replies 3 Participants Last post by  Mike
i have a 69 elcamino just bought ,tryed to figer out the numbers on it..the rear reads GCC 364 and a 1 or an L,looks to be upsidown num 1 ,,what would the ratio be and what year if it has been changed??????????
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thanks for the replays best i can guss is a 273 ,71 motal not a pos and i have jacked it up and turned the drive shift about 1 1/2 turns to one,= x 2= might be 273 or a 308,,,,,,, i read it as Gc meaning 71 273 and the next c would be for gm built,,,,i just don't know,
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