You'll be pissing in the wind with that shit. I wasted a ton of time on my first port job on a 2.3 Ford. Iron is a slow grind. You watch the stone wear down on the iron. Flap wheels and rolls are not up to much iron - though the high dollar name brand like Norton are miles better then the Asian jobs. Experience has taught me carbide burrs picked up at the big swap-meets for around $10 ea are the only way to go. I learned the "special" big flute alum burrs are a nightmare being far to aggressive on alum. For alum & steel I use carbides and plenty of lube and allow lube to soak in the piles of debris as a reservoir. Fine oiled burrs leave magnificent clean "machined" surfaces. Pneumatic die-grinders are pokey, noisy, windy, frustrating with variable torque/loading and even great for freezing your fingers off. I started with a Harbor Freight elec die grinder and finally scored a magnificent Bosch 30,000 rpm die grinder that purrs like a kitten and will take a loading w/o dropping rpm at a pawn-shop for a song
