The rear is not saging. It's an illusion in the picture. The driveway is slightly up hill. I went with a spacer kit, and reused OEM shocks, but wish I would have went Bilstein but maybe later.
Very few tools to put a stereo in the truck especially if you use the OEM wires for the speaker. Just lots of plastic clips. Pretty much a standard and phillips screwdrivers and a 10 mm socket.
I finally had time to trouble shoot my problem. I had added a + and - wire direct from the amplifier to the head deck, thinking it was a voltage difference causing a noise, no change. I started to check the RCA wires. With RCA wires unpluged from the amp no noise. With the RCAs plugged into the amp but unplugged from the head deck-noise continues. It looks like I have a bad set of RCA wires and will be searching for a new set.