So I installed the ProComp spindle lift kit this weekend. I ordered online from 4WheelParts with no problems. It came with 3" lift spindles for the front, 1.5" add-a-leafs for the rear, and 4 new ES3000 shocks. (Before-after pictures are in my gallery). While it was apart, I put in new Raybestos ceramic brake pads, turned the rotors and repacked the wheel bearings. New 285/75-16 Dunlop Radial Rover tires were in order, and I added an OEM 4x4 valance with fog lights while I was at it.
The spindles came unpainted cast iron so I gave them 2 coats of Rustoleum gray. I did the install by myself and it was straight forward. Strong jack stands, a good rolling floor jack, a sturdy puller for the front-end joints, and a torque wrench are needed. Based on other thread disscussions here, I used 5 jack stands for the rear springs: 2 under the frame near the back of the cab, 1 at each end of the axle, and one under the front of the differential to keep the axle from rotating once it is loose.
The spindles were high quality and fit perfectly. The toe-in was way off after the install so I had to eyeball the adjustment just to drive down to the tire store for tires and an alignment. Only glitch was the front shocks which ProComp sent with the wrong crossbars, so I had some minor fabrication to do.
The new spindles do move the front wheels out about 1 inch but it looks good. Great new look, ride and ground clearance. ES3000 shocks work very well. Overall, the handling and ride is much better (due in some part to the shocks and wider stance). The add-a-leaf does stiffen the rear up a bit but, by no means uncomfortable.
(thanks 'Decides' for the information on the spindles!)