Kind of an oxymoron there,.. LOL

I honestly dont have the experience. The only set I ever did was my own. I paid $100 for the heads and my short block had 136k on it. I took a risk and no harm was done.

The thing is on 4.6 pistons you grind out on the crown of the piston. The valves dont hit inside the dish. They hit on the outside crown because the bore is so small. If I did yours I'd be experimenting all over again. I dont think you want that. Let someone with a little more experience handle it.