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

You do understand that the difference between an engine that runs for 100k miles and one that blows up instantly comes down to 0.001" or less of too much or too little bearing clearance... Right? Do you realize just how small of a distance that is? That's why you don't use a soft compressible material like freaking chewing gum or wood to set your bearings in for measuring. This is beyond amateur hour man, you're the one who needs to "get real."
who says I am gonna do a complete assembly, and start the engine. I am not. You guys don't seem to be able to comprehend a simple paragraph Also the shallow research you post for me is outdated. Bearing spacers at SW performance cost / quoted me $400. But the .001" info is right on.