I don't know about the 8 gauge but my 24 gauge GAEP roll crimp head does mount in my drill press. It requires no other tooling to crimp over an overshot wad (other than a means of clamping the hull to be crimped so that it doesn't spin). GAEP makes the best roll crimping head that I've seen.

I ordered by e-mail, paid by Pay-Pal and it was delivered by mail 10 or 11 days later.