340 build plan for the second time!

Hmmm...makes sense. This situation just gets more and more interesting. The original builder told me they were 0.30 over. I do not have a mic, is there another way to check and see what size they are. The new machinist has not checked the bores and sizes yet, just looked at it and planned the build.

Then it has to be a 40 over piston because 340 factory bore is 4.040 and a 360 bored 40 over is the same!