Quote:
Originally Posted by Mike Pearson
They are for a 4.075 bore now. I would like to go down to 4.065 if possible. That would be .005 off the radius.
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Piston skirts are usually not cylindrical. Some times they are some combination of tapered, cam ground, barrel shaped.
I wonder if JE can resize them.
https://www.jepistons.com/Catalogs/Automotive/NHRA.aspx
As others said, the ring grooves may need deepening. I don't think that can be done without the ring seal suffering,