I've been looking around the web for info on this and it appears that those that do believe there are gains to be had are focused mainly on opening up the bowls just under the valves and then basic blending for the rest of the ports.. with a polish on the exhaust ports and the chamber. I am thinking of maybe doing this while keeping everything else in the engine stock. I have a pacesetter shorty header and iceman intake. A 2.25 exhaust will eventually be coming. I figure opening up the bowls should especially improve low valve lift flow, while helping higher lift flow too. It looks like the valve lift is really low on these engines ---- under .35 ---so anything to help flow at low lift would be very beneficial. Any input would be appreciated.