I tried to machine one of those domed pistons flat to replace a piston someone dropped and broke during a rebuild. It only managed a few minutes of run time before burning a hole in the middle. Those cast iron pistons are very thin under the dome.
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!