Went through the rear axle ('75 Chevy truck 12 bolt) and put all new seals, bearings and brakes. Welded in the airbag crossmember then mounted and plumbed the rearbags.
Here's a short video of the ride height and down to the bump stops.
After installing the bags and bump-stops I think I have a some what safe scrub-line, when I'm flat on the bump-stops the frame is 2" off the ground. When I'm aired up to ride height I can deflate the tires and have about 1.5" of clearance, So as long as I don't lose air pressure on the bags and have a flat at the same time I should be ok.
I've started fabbing up a new trunk floor, will mount the compressor and airtank on the top shelf area.