Rear Upper Shock Mounts

When i first installed my lift on my 97 Xj, I snapped all four of my shock bolts...so I drilled them out and used new hardware to mount them through the rear cargo area. i am getting some Bilsteins for my bday and I want to change this up a bit...any idea how I can strengthen the area without fabbing? (no welder, grinder available) Was thinking about just using some nice grade 8 bolts with some nice washers and nuts.......or I guess I could use some BPE? even though the holes at the top have been drilled out???

If you are going to using 5100s, then they already have a bar pin. Just get new hardware. If you are going to be using some 7100s them you would need to pick up BPE's for the top.