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The push button shifters changed during the 65 model year. Its possible someone installed a 65 or newer 727 which required a different shift mechanisum. The floor shift would have been the fast, easy way out. Gene

the 65's were the last year for the cable shift trans. although they got away from the pushbuttons. They are very desireable because 65's had a slip yoke instead of the ball and trunion joint.