[Goat Blower]

It's still the same, each of the aftermarket piston suppliers provide the proper piston-to-wall spec for their piston, and a little knowledge helps to know if you want to go beyond that for higher horsepower applications. But for 98% of those out there, the those specs are just fine and can be done by any competent machine shop. The real trick is in assembly, where I learned the hard way about ten years ago, that not all speed/machine shops can actually do that. And no, I'm not talking about any existing shops here, who all do fantastic work. This shop is long gone.