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THIS PISTON WILL WORK WITH THE OLD STYLE PRE 81 SHORT CONNECTING RODS AND THE STOCK Z50 HEADS THAT ARE ALSO 1981 AND OLDER. WILL WORK WITH NEW_70_DOME HEADS TOO
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THIS IS A 52MM BORE PISTONAND NEEDS A SPECIAL CYLINDER AS THE STOCK 50 AND 70 CYLINDERS WON'T BORE OUT THIS BIG.
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