i have the 2" drop chevy shackles on my xj and i havent seen any problems on the mount with them. i would definatly go with boomerang shackles instead. there is no room for my shackle to go back :doh:
I have a RK 8" kit that came 2.5" boomerang shackles that uses the stock boxes. One shackle 2 lift hight choices too. Been running it for 4 years now. No problems.
just got a reply - sounds like a super nice guy - no installed images yet b/c hiscomp is still full of viruses ... so he sent me some clean CAD drawings...