I have a line on a barely used Safari rack for a TJ. It mounts on the rear bumper and connects where the windshield hinges are. How difficult would it be to fit this to a JK?

 

I'm thinking very dificult. Mostly because of the greater width of the JK over the TJ.

I think my biggest question would be how much is the rack? Depending on how much they want for it would sway my opinion as to wether it might be worth trying. But it would have to be very cheap to be worth it IMO. Also, I don't think it would be as structurally sound as a rack made specifically for the JK. So depending on how you want to use the rack might also sway the desicion.