Good advice Steve - The screws were in fact very tight, and I stripped one a litle before switching to the socket.

JGeorge - as it turns out, my situation was quite similar. I pulled the original coil pack, dried things up a bit, and installed the new one. It was still stuttering and sputtering for the first couple of minutes, but then it settled back down to normal and drove home just fine. I don't think the problem was the coil - I think it was just moisture in the well.

I will try to swap the original back in and see what happens. It would be nice to have the original red coil back in there instead of the black Delco coil. :-)

Thanks again everyone!