Tom, no ridge at all in any of the bores, after talking to a few stovebolters and doing some careful measuring, I will more than likely ball hone it and re ring it with the stock pistons.
Probably will be resting in the mounts in my 53 this summer.
Wally this came out of a 62 C60 and it has been in bypass mode the entire time, maybe it was a rpo to have it either way?
Others might know.
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Last edited by sstock; 05/04/2019 1:02 AM.

1953 Chevrolet 3100
261 cu inch, sm420, 3.55 rear, torque tube still,omaha orange, still 6 volt, RPO green glass, side carrier spare, all done
In the DITY Gallery
Video of the 261 running

1964 GMC 1000
305 Big Block V6, sm420, the next cab off restoration