[johney5]

Here's where I give some tech info back.
I have an RRS rack on my fastback. Since the install, I was a happy but not feeling great at high speed driving. The power assist 'feel' was just a bit too nervous (frisky). I had been using the stock Ford pump.
I just changed over to a Randall's power steering pump, and added a Heidt's valve, in order to have as much control as possible. With this combination, at first I was still a bit disappointed, as now there was not enough assist. By drilling out the valve in Randall's pump, a tiny bit (two drill bit sizes)...I finally have succeeded in getting my car to handle like my 2005GT. It's just perfect even at 90 mph...I go dead center down the road. The whole steering system has become really fluid, and much quieter than the old pump. I think this is the single best improvement I have done to modernize this car.

 

[CPRsm]

we ended up using a AJe racing kit that uses a stock 90's rack and pinion and also used a 90's PS pump with a slightly modified stock 66 bracket. Out of all the other Rack kits the steering was just right using most stock style equipment.