Finally going to be starting the SAS on my '98 Silverado 3500, crew cab long bed. Been finding parts and planning out since I got the truck about 8 months ago. Progress might be a bit slow as there isn't always garage time with three kids and a full time job, but I'll post updates as I can.
Started with a stock '98 3500
Leveled it and put 285s on
Found a HP 60 locally to start with. Housing, knuckles, calipers, spindles and rotors.
Cut tone rings into hub's to keep abs operational.
Working on steering now and have lots of parts on the way, will post more when there's some progress.