Big Block Chevy Heads 241 for Stage III. 5 Porting

This is a Stage III. 5 Port job on a set of Big Oval Port BBC heads casting 241. The beginning is combustin chamber mods in setting up for the 2. 250 and 1. 88 valve sizes. Most people would say that is too big a valve for that medium size port, and nothing could be more from the truth. This is an OLD TRICK to make the Oval BBC Kick BUTT on a street driven 454 CID engine that will seriously out perform the Rectangle Port heads up to 6500 RPM. You must first get the chamber mods done up before the valve work c