For that one, I've always just used my taps. Especially old ones that I don't mind grinding the tip off of. Just spin it into the hole, and it usually cleans it pretty well. If it doesn't want to go in, a quick dab of WD40 always helps, just be sure not to force it bad enough to crossthread it.
If you don't have dies, take a bolt of the appropriate size and grind some slightly angles slots lengthwise with a dremel. Also works for fixing crossthreaded holes in decades-old Ford small blocks, in a pinch.