olskoolpup
+1y
not sure about tubular arms, but to lay the front youll need drop spindles, and a torsion bar bag bracket kit (gravity werx or sd.com). for 20s youll need to tub the firewall for sure. the one i bagged would have been really close if it had 18s (was on 16s with fatty rubber). there was def travel left though, so you may not NEED tubular arms. i would however, modify the lowers into a-arms instead of running the radius arms.
overall, they arent hard trucks to lay out at all. pretty similar to a hardbody, but not exactly the same.