Navarro six, block weirdness

[Tom Jennings <tomj@xxxxxxx>]

This Navarro block, the bore is undersize. I measured it three
times.

3.595" diameter, all concentric, no ridge or damage. Weird. Makes
for some damn thick cylinder walls though!!

So none of the pistons I have are from this motor -- they're all
3.75" (well, they measure 3.735").

Can forged pistons be reground? They have practically zero hours
on them.  I've got nine stock diameter Venolia forged 199 pistons.

Found all the wrist pins plus a dozen extras (floating type) and
2X solid lifters and adjustable pushrods.