Which one? Or does it matter? I've pulled quite a few Clevelands out of wrecking yards and they're all quite different. '71s are fairly small and fasten with 2 bolts (and the locating dowel) while '72s are much larger but still fasten with the same 2 bolts & dowel. A '74 had no actual marker, just a 3/8" hole for some sort of sensor that apparently was part of a kit likely used only by dealers.