I ordered and installed the AGR quick ratio box, along with ported pump, on my '97 2wd. Had a question about the EVO (turns out AGR includes the needed fitting, so it's plug n play to delete EVO), so I called them. The actual owner answered the phone. That impressed me. We then had a fantastic conversation about the box, and steering in general. He's a super guy, and very passionate about his product. The box is GREAT, but I wouldn't recommend the ported pump. It lowers the assist quite a bit, and feels exactly like the steering in my '98 formula firebird with a turn 1 pump installed. Very "road course" feel to it. I love that in my bird, but not in the truck. Also, at low rpms (especially when backing up, the shifting from reverse to drive) there's essentially no assist. You have to blip the throttle to get the steering going, otherwise it's like driving a car that lost all its fluid. I'm very happy with the box, and once the truck is above 40-50 mph, I even like the tighter steering, but it's a bear in parking lots and such. I need to either adjust the pressure valve shimming or just replace the pump with a delco factory. Anyhow, great product, great company owner, very satisfied customer. I highly recommend them.