What guitar? Only some acoustics have bolted necks like Taylors. Most are joined to the end block with a traditional dovetail. As long as the pilot hole is drilled into a suitably substantial part of the heel and is deep enough, no worries.
I'd take it to a pro who can do it with his eyes closed. I've never been charged more than the cost of the button (and maybe the price of a beer) for this job and I've had it done in at least three different places.