port matching the intake manifold?

You can use carbide cutters to cut aluminum. just have to turn it slower and dip the cutter in oil every couple of minutes. that will keep the cutter from loading up. Aluminum carbides are best (large flutes), but double cut carbides will work ok if you don't have aluminum cutters specific. The oil also helps to cool the cutter. regular motor oil will work just fine. Yes, port match but keep manifold smaller than heads. Good luck, Terry.