Sorry if this is a repetitive question, but here goes!

IF I decided to use my Fiesta rack (rear rack), and turned the Cortina uprights round (ensuring castor is correct etc.), as I understand it, if I move the Fiesta rack rearwards, until the track rods meet the steering arms at 90 degrees, i will have zero ackerman. Forward of this point, I will have reverse ackerman, backwards from there will be increasing ackerman. Is this correct?
(Unless anyone has a cheap escort rack?.......!)

Sounds about like my system of beliefs . . .sounds quite tricky to get the angle of the steering arms though.
Castor angle is set by position of top & bottom pivots & these are on the wishbones so no worries there (except that the book design has a 1/2x mistake in it)
Bob

Almost but not quite with the rack in line with the ball joints you will still have a small ammount of ackerman with increasing ackerman towards ful lock. With rack and pinnion steering you can never have zero ackerman througout the range.