i have attached a pic of my 85 with a 3" front and 4" rear lowering kit from Bell Tech. Spindles in the front and new leaf hangers and shackles in the back. No change in shocks up front as the geometry stays the same so an alignment is also not necessary. In the rear, I elected to use shock extension hangers instead of shorter shocks. The extensions allow you to use standard shocks by lowering the mounting points. Although they hang lower on the axle, they maintain a similar angle so they work better. If you don't use them the shorter shocks are at an increased angle and don't react the same as stock because its less up and down due to the angle. I have 15X8 AR Torque thrust rims with 3.75" backspacing. These rims did require trimming of the lower A arm lips. Pretty easy to do. However many rims have 4-4.5'" backspacing so they require a little more trimming. My tires are P275 60R 15.
Installation was relatively straight forward, and if you're not an expert mechanic it will take you more than a day. Ride is awesome, and I only experienced positive results with nothing negative to report. Granted, rear travel and payload are reduced but additional trimming of the bump stops will increase that slightly.
I prefer this look over the 4"front and 6" flips, but that's just personal opinion. Installing shorter springs up front will almost always require alignment changes, so that can be viewed as a negative. Flipping the back usually requires C notching the frame to get any travel, so again that can be a negative if you want to haul anything. Also adds complexity to the job. Hope this helps, good luck.