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

Jessearent said
Ebay, JE pistons, 7 for $60 , yes they are new... But who knows what they fit...my neighbors 3 boys all a birthday this month....guess what they will get to display on there dresser? Each a sshiney new piston.

Then I can understand why you did what you did, nothing wrong with doing a experiment.