Like a lot of parts, 68-72 interchange. I put a set out of a 69 Camino in my 70SS Chevelle, fits perfect. Z-bar is the same on small and big block on those years. I believe earlier years used different linkage for small and big block.
That's right, all 68-72 linkage/pedals interchange. Most, if not all the aftermarker vendors sell everything you will need. The holes for the bracket that bolts to the frame to hold the ball stud for the Z-bar are already in the frame, even on auto cars. The correct bolts are self tapping, just put plenty of pressure on the wrench and they will screw in. The rest is too easy. It warms my heart to see people switch to a 4sp.
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