Speedmaster CNC chamber cc's

The first engine I ever rebuilt - a 383 - probably 1980 or so. We ordered parts from PAW, and 'upgraded' to Clevite bearings. We used their proprietary 272H cam and lifters and their rings and gaskets and timing chain. Did we grind the crank or overbore the engine ? Hell no. No one had money for that. So anyhow....that engine ran fine and last week the guy I eventually gave it to told me it's still running in his truck that he uses to haul junk in.