[rbohm]

well since you need to rebuild the engine anyway, i would pick up a set of probe pistons. they are lighter than most forged pistons, and they are "cam ground", meaning they are an oval shape, you will never see it by looking, and thus they can run tighter bore clearances for quieter operation. never replace one piston as they are a matched set and you can throw the balance off quite badly. have the rotating assembly balanced, but dont spend the money for blueprinting as it is not needed on a street motor. the restrictor kit is available from your local ford dealer that deals in the ford racing parts program. what they are basically is plugs that screw in to the passage to the cam bearings. they have a small hole drilled in them, about .090 as i recall, to allow oil to the cam bearings, but they force 90% of the oil to the mains and rods. neat settup really. your machinist can install them easily.