Hey guys, I'm new to trucks and am wanting to go as low as I can on my 66 SWB without doing a full dropmember front, tunneling the cab etc. I will be running air bags front and back. I want to use as many stock parts as possible to keep cost down. I plan on using CPP drop spindles up front and a 6-8" notch in the back, with stock trailing arms and 3" or 4" lowering blocks. My goal is to have it sit like the truck below when aired out all the way.
My question is regarding the trailing arm crossmember. Do I need to replace my stock one with one of the aftermarket ones made for lowering (porterbuilt, ece, brothers etc.)? How low can I go in the back before the driveshaft hits the top of the opening in the stock trailing arm crossmember? Thanks!