And just how does anything having to do with an IFS resemble a solid axle 5 link?
I have never installed or run a RCD setup. I have a Skyjacker 4. 5 on mine and have installed and driven a Kore on a 3rd gen. No matter what kit you get, it is still a 7000-8000 lb truck, not a vette.
My impression of the Kore is that it is a very nice leveling kit that levels and adds maybe an inch of lift. I also had to elongate the holes in the leaf springs because the spacing they set for the spring bolts was wrong. Keep in mind spring steel isn't the most forgiving stuff and I ended using my vertical mill to adjust the holes. As the ride, don't be fooled it is still a 7000lb truck. It can only be so good. The main difference is in the shocks and their damping rates. Kore does a good job on setting them up. (Don Thuren also has his own custom valved shock packages)
The Skyjacker wasn't bad to install and rides fairly well. A little chop from the short front links. If you look up skyjacker look at rocky mountain suspension, their website explains all the types of kits from SJ. I run a single flex class 2 lift. One end of my links is adjustable and I have new rear springs. (SJ does not have the correct ubolts for a dana 80 rear, you will need to have some made. Not a big deal and heavy truck suspension place in your area can make them up for you. SJ may have corrected this but 18 months ago I couldn't get the right ones. ) My truck also lifts when you hit the brakes. It is not much but I notice it and find it a little annoying because that causes it to rock a little when it comes to a stop. All in all the SJ is not a bad kit. Just order it through some place that knows the product so you get the right pieces the first time. I ordered through performance products to save $100 and got the wrong shocks, twice and no rear springs. rocky mountain suspension has been around forever and really knows the SJ kits.
I looked into the RCD kits when I did mine and went SJ instead because I didn't want the 6 inch, I wanted 4 inches. And the SJ came with springs so I didn't have to weigh my truck and have Alcan make the leaf packs for me. I think I should have tried the RCD. I know I would be happier with the Alcan leafs and the long arm will smooth the ride.
Tires, I ran MT bajas on my jeep for years. Tough and worked great. B load range though. Hydroplaned a lot. Don't know squat about their new tires. I ran 33 inch truxus MT's, not bad and lasted about 30K. Then tried parnelli jones, 35 inch, I have not one good thing to say about them. Handled like crap, wandered all over the road and wouldn't balance. I had them balanced three times the last time on a Hunter road force machine. I called the dealer, no help, called PJ, "talk to the dealer. "
Now I run 37 inch Pro Comp X terrains. Work great in sand, mud and snow. I have about 20K on them so far and love em. I balanced them with innovative balancing ceramic beads and they run true and handle great. Only load range D though. a 15K trailer makes em sway a bit. but overall, I would recommend them for all general use. I don't even air down to run on the sand with them. I cover about 10-20 miles on sand to surf fish 3-4 times a year. After a 5 hour interstate drive. They are just good all around tires. And the ceramic beads work great. I don't have to pay to have tires mounted and balanced anymore. I mount them myself and put in the beads. Only thing about the pro comps is the tread is directional so rotating is tough. I just switch back to front. And they will take you nearly anywhere going forward. But they don't like to back up much. It can take some motor to get them going backwards.
Good luck.
Check out the Thuren website. You will want his trac bar if you lift your truck at all. He also sells some other neat stuff for our trucks.
Attention: TDR Forum Junkies 
