I have the old style RK 3 link but I can say this, use center punches for the holes you drill, have nice sharp bits and use a slow right angle drill. I'd also suggest welding the brackets on, also now is the time to get frame stiffeners put on. I was in a rush to get my old lift off and my new (used) rk kit on so I didn't have time to get them, really wish I did as it would give me a much better piece of mind with them attached to something other then sheet metal...
Have fun getting ur upper control arm bushing out, expect to use a crowbar and a hammer/prybar to get them out... that plus a torch and lots of cursing. Grind edges onto the trans crossmember studs and grab it with vice grips, unless you go out and buy a stud puller thats the only way I see to get them off. I broke one of mine and ended up just putting a small weld on the crossmember to the frame, I'm probly going to have to somehow weld a new nut inside the rail when I get around to it.