I got some daystar universal bump stops and the bolt holes don't line up so I will have to drill a hole to fit them on but it is going into the frame so I don't no how to get a nut on the other side. How can I get it mounted up or where can I get some extended bump stops for my 89 xj

 

drill a 1/4" hole and place a 3/8" screw in it
it's just an example.
drill 3/8 for 1/2