I finally got my car running last night after putting on my new hot piping setup with a recirculated 1G DSM BOV. Car runs great; idles fine, pulls pretty hard, etc. etc. The only thing is, I can hear (and feel) a BLAT BLAT BLAT noise when pulling away from a stop. It goes away, more or less, as the RPMs rise, but the car still sounds a little like a Subaru.
So I do a lot of searching on here and figure that my timing is probably off. Before this I was driving around with boost leaks so I wouldn't be surprised. And then I remember that, when I changed the plugs a couple weeks ago, I had found that the coil pack screw for the #2 cylinder was broken off inside the valve cover

Not my handywork, I only bought this car a couple months ago.
So not only is my timing probably off, but I think I'm getting intermittent spark because there's nothing holding the coil pack on except gravity.
Has anyone ever tried to drill a coil pack screw out of the valve cover? I've never tried to drill anything out, and at 6mm, they're pretty small. Am I better off just finding a new valve cover? :-\