[Shane@DBPerformance]

You want the head to perform optimal cylinder filling. Too big of port/too much flow and velocity of the air slows down so much that you don't get a complete fill during the intake stroke. You could bore the hell out of the ports and make them flow whatever on a flow bench, but that might be counterproductive unless you are reving to 15,000 RPMs.

It's is hard to say what is best. The old conventional wisdom was that bigger was better, 1G head had bigger ports, so it's better. I am rarely disappointed by cars on the dyno with 2G heads once the shitty intake manifold, TB and cams are replaced. I am often disappointed with cars with ported 1G heads on them, more than ones with stock 1G heads. I don't push head porting at all at our shop, most of the decnet power DSMs that I have dealt with have had unported 1G or 2G heads. Some of the fast guys started figuring out how little doing a stage 19 head port helped when they would ruin their main head and have to throw on an unported backup head at the last minute at the track or dyno.

I would do a little clean up work on any majopr casting flaws, but I wouldn't go much farther than that, and polishing is absolutely worthless except for pictures.