Spacer lifts combined with our Flatout GR will work, if you want to commit to something along the lines of a 4 inch lift. If you want 2-2.5" lift, a spacer lift won't be needed and will cause more headache than anything else.
These shocks will not change the stiffness of the ride - they are designed to match 1:1 with the spring rates. 3 clicks clockwise = 225lb spring, and 9 clicks = 250lb, 18 clicks for 350lb, etc. (these are arbitrary numbers for example sake). Tire weights, wheel weights, etc WILL change the way the suspension feels, regardless of the spring.
We offer three variations of our lift suspensions from budget friendly to all-out. Use this guide to help decide with one is right for you beyond the price tag.