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

1st off it's you're not your.
See proof i am smart.
And i have them in here stock steel crank. Yes the forged TRW high compression one's that are above deck. And with closed chamber heads. I had a real machine shop mill them. And shoot peen, resize the rods with ARP bolts, rebush small ends. Balance Crank. The closed chamber heads,are 52.5cc.
The way YOU are doing it is a hack. Do it once do it right.

View attachment 1716095717
Never doubted you are smart. Hope your memorial day gets you rested and stronger. Sincerely Jesse