Slee heavy 2.5 OME vs. Manafree heavy 3J OME lift kits. Slee's is made as a kit by OME. Manafree's is put together with their drop bracket instead of OME's bushing offset. I am planning on Slee front and rear bumpers. I'm old and want the truck to ride and handle good on the road. Which on of these kits should I use? Should I go with the medium springs?