When I broke the bolt off, the threaded part was still attached to the welded nut on the shock. I needed the shock so I had to cut off the bolt from the inside. I tried to get the rest out of the welded nut, but it no luck, so I had to grind it off. I just have a new nut not welded to the shock on there now.
Since you're going with new shocks that's not an issue for you. Although I would rethink the GR-2's. Mine started to rust after only one winter and leaked after about 60,000 miles-although I was using H&R OEM sports (1/2 inch lower). Biltsein HD's on there now, very happy! Stock shocks are very good also.

I was going to get the aftermarket LCA with the bushing already pressed in but the shorter length for wider tires had me worried about the camber of the rear wheel, so I just redid the stock arm with bushings.

A few years ago I did the Energy Suspension poly inserts, but I drive 50,000 miles a year and didn't like the ride quality. They did hold up pretty good though.