Welcome from AZ !
My GF is from Rockford and my stepdad was born in your neck of the woods.
I am familar with Sun Devil lowers. Buy a bolt catch like the Armalite Ar10 or the DPMS lr308 version with is larger than the standard ar15 bolt catch. Also go to a hardware store to find a threaded bolt/screw to fit you hole in the receiver. Drilling and tapping in that area is a super PITA , would NOT recemend doing that at all , way to easy to F@$k up. Order the part and wait if you have to.