Hey GLH, you can put them completely together outside the truck and slip them in, I didn't even have to take the rear wheels off. I ran the air line out the license plate bottom holes, there is a nice hole stamped in the steel backing where you can run the air nipple, I had to drill the plate holes a little but this is a great place and easy to get to, plus the cap holds the bottom of the plate now. I keep 5lbs in them. I have the Firestone also, they are the same as ride-rite. Just put both together, tighten everything and slide them in, I have a 4.5" block, you may need to jack the frame up a little to slide them in. When I drop the tongue (600lbs) the truck does not even budge at 60psi. You may need 80 for your beast but you will be level and secure, even side to side motion is helped, just like a sway bar. I was going to install a bar but this works fine. Good luck, let me know if I can help. Make sure you lower the truck if you do have to jack it up so that you tighten the U bolts in the right place. I paid 225 also so you got a good price.