I did my truck with 52" leaves and 35s up front. Used custom front front mounts and mounts from a 77 GMC in the front rear. I flat plated the front crossmember for clearance and also changed the mount for the anti-swaybar so it had as much up-travel as possible. I don't have any fender or bumper trimming happening, although it does hit the back of the wheel-well on full compression if it's turned. I'm sitting about 1" taller than my buddy's 6" ifs truck in front and 2" in the rear.35's is a small tire to put on a SAS without toweirng them. The way thse frames are designed you will have to replace or modifiy the original LCS front xmember to have enough compression for leaves to clear. Cajun4x4's SAS has 3" ORU hangers and 4" lift leafs and he clears 38's and he is LOW. Granted fender trim is a must on SAS rigs.
SAS can be done but when trying to keep it somewhat low causes some issues.