I have tried two different set ups. The first was mounting the Mazda rack to the original X beam with modified mounts, stock spindles and hemi rod ends as tie rod ends and MGB steering arms.
I needed to use hemi rod ends as they positioned the tie rod ( Tie rods being the arm that links the rack to the tie rod ends, explained as they seem to get called different things depending on where you live) centres closer to the steering arm which reduced bump steer. I could space them with washers until I was happy I had them in the correct position and then had spacers machined up. The car drove well and had no sign of bump steer.
The only thing I was not happy about was I could only get 12mm hemi rod ends and I felt they were a bit light for a Tiger. I would have been happier with 14mm.
I had been in contact with Jim when I was doing the conversion. He had the difference of using Minx spindles on his car. He took some measurements of what his set up would be using the Minx spindles and Tie rod ends and thought the set up positioned the height of the tie rods close to where I had them with the hemi rod ends and Tiger spindles.
The Minx spindles raise the mounting point of the steering arms which allow the use off using tie rod ends. Yes this is more about bump steer.
My original X member was not in the best condition and had been repaired cracked again so I picked up another from a Series V Minx and modified that for the rack. These X beams are all the same in the series Minx and super minx I was told and the SV measured up the same except it hadn't sagged.
I made a jig so I could raise and lower the rack and measure bump steer with Alpine tie rod ends and Minx spindles. Once happy I made mounts to suit.
I made up some bump steer bars to measure the toe deviation through suspension travel.
The end result is the car drives like a dream. Power steering makes around town driving a pleasure. My idea is to get the car easy for myself and wife to drive. My original rack was well worn and the extra amount of muscle needed with a midget rack would not have made my wife happy to drive it.
As for the Ackerman angle issue it helps a bit. I don't get scuffing of the tyres on full lock but that could be the turning circle has been increased a little from using the longer MGB arms. But then my way of thinking is you never try and turn a Tiger with stock steering on full lock anyway so I have lost nothing.
The Ackerman angle is only really a problem when turning on full lock anyway.
I would have put up more pics but I am a bit computer wounded at the moment. Most pics are on another computer which has packed a sad , I could post more on the weekend if needed.