There's such a wide variety of basic 4" diameter pistons of all brands and OEM applications that I would have a hard time imagining there's not something close to what you need, considering either/or compression height and wrist pin diameter. Instead of limiting your search to forged pistons, look at what's available as hypereutectic cast. Those things have virtually zero thermal expansion, and they're tough as woodpecker lips. When I machined the crown on a set of Speed-Pro hypereutectics I was going to use on al altered-stroke Chevy 305 V8, I ended up having to use a carbide tipped lathe cutter bit- - - - -a tool steel bit would get dull after a couple of passes. 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!
