I noticed when I pulled the ring that the piston is cut for the ring, so I guess you have to use a dyke ring or have the piston cut to remove the ledge in the groove.
'75 Plymouth Duster Phase I 451 906/590/2-660 10.75/126 Phase II 451 Stage VI/590/1050 9.82/135 Phase III 383 906/Victor-Pump gas 11.30/119
"For by grace you have been saved through faith. And this is not your own doing; it is the gift of God,"
