Shock update on the 4 door 'hoe:
1500 lb front springs with a coil removed work well with ~2000 chevy express 2500/3500 AC Delco factory replacement shocks. Ride quality is good and the high speed damping is spot on. Low speed damping is a little on the soft side for my taste, but that's probably why the ride quality is good even with springs close to double the factory rate. I'm impressed. Shock dimensions and travel are similar to stock Tahoe, so good for moderate drop or spindles but not for large spring-only drops. Poly or delrin upper shock bushings are critical for making these shocks and springs work without a 'jiggly' ride quality. Energy suspension offers some that fit when drilled out, or you can make your own.
2200lb capacity leaf springs have been a constant challenge for shocks in the rear vs stock 1500-1600 lb ratings, plus the axle flip and goofy shock lengths make finding shocks that are appropriate length challenging. Tried the matching Express 2500/3500 rear shocks +relocate from Bilstein, but they are way, way too stiff for the lighter Tahoe body and don't have enough travel even with relocate brackets. Shocks intended for the 2wd tahoe were too soft to control the springs and didn't have enough travel. I'm now using Hotchkis/Fox Racing shocks for a '94-'96 Impala SS with custom lower bushing inserts to fit the different Tahoe mounting style. Rebound damping on full stiff is about right. Compression damping is a little too soft for me, but again, it makes the ride quality pretty good considering how stiff the springs are. Shocks also offer about an inch more travel than the Tahoe/Express shocks, plus I welded up some new brackets that make the shock lengths the same on both sides and fixed the angle. All of the off the shelf options, including stock, have maybe 1.5" less travel and a much shallower (less vertical) shock angle on the driver's side vs passenger. Again, getting the lower shock mount and the shock angles right is the difference between 'jiggly' underdamped ride over smaller imperfections and a good, controlled ride.