FIrestop at top of basement wall

I'm currently finishing my basement. The walls are all framed at this point, and I'm about to put firestops in between each of the vertical studs. The building inspector said that I also need a firestop on top of the masonry wall, attached to the bottom of the ceiling joists. He said that usually this is done with a long drywall strip. In my case, with the wall framed, I don't have room to place a long strip of anything on top of the masonry; I can only use whatever I can angle in between the 16" studs.

Are there any recommendations as to how I can install this firestop easily?

 

My inspector told me the same thing. It appears our situations are similar. My wife and I used Type X wallboard and just cut the pieces to fit. It wasn't as bad as it might seem. We put a couple of nails in where we could to secure the pieces in place. We were more concerned with the width of the pieces and getting a snug fit. The depth wasn't as critical as long as it fit and could be secured on your top stud and did not overlap into the finished room. Our basement is about 35 x 35 and we used about six (6) total sheets. I hope this helps.