porting for KA Throttle Body

[sjbsuperman1425]

So I began porting the intake manifold for the KA throttle body last week, and have made minimal progress. I'm just interested in what you guys have used?

I've been using some of the bits that came with my dremel kit (grinding stone) with a 14.4v Drill and its working, but taking awhile. Thanks.

[Frankenfourty]

Carbide bits work really well. I use the tapered ones. Then go over it with a less aggressive grinding stone to smooth it out.