Use a table ban saw to hack off the 340 piston crown .

Eh, you don't need no fancy blade, just run a paneling blade backwards and go really slow........slowwww, NOOO000000! I'm Thinking he needs to take the correct # and mail em to 1wildRT... sure you can do it just about every way it's been discussed but I mean come on man we're dealing with something that's supposed to be Precision, dammit!!
Yeah, and as I take the time to read more about the whole plan I get concerned for the success of the project... I can cut the pistons but typically that's a .030-.040 shave... By doing the math he might need as much as .135 I haven't seen a piston you can cut that much off and not have a thin crown... As well as balance issues.....

I'll cut them but I sure won't take responsibility for them..