[Jack21]

I get nervous whan I hear, "A guy", instead of "A machine shop" that will actually do the work. I smell a hose job.

Flat top pistons? Most replacement pistons are flat tops, with valve reliefs.

What is the motor in? What will the motor be used for? Daily driver? What year is the motor? Is it a roller block? Carbureted or fuel injection? What kind of fuel do you intednd to use? Regular, plus, premium? This will determine what compression ratio you should use.

What kind of performance do you want from the motor?

Not an easy question to answer, but we'll get there.