if i did all of the above though... high compression pistons like type S pistons (raise compression to 11:1-1) or even more dramatic... 12:1 forged pistons... then have the combustion chambers welded and hand polished... and get skunk 2 cam shafts and gears. what is milling the head? and is porting and polishing worth it...? what gains could i reach by doing a port and polish head job.?