I dont have a Escort but this may be of use. I made my own rack conversion for my Corsair, and used a Fiesta mk3 coupling on the bottom of the column. Now these are a stamped/pressed out item with a hex in one end splined in the other. I found after much head scratching as to why my steering was a bit notchy, they are frankly, shite. I thought I would get a proper Ford mk3 fes one as the one i was using was an aftermarket version. The Ford one was even worse, everything was trying to rotate off centre, and the splined end was badly made also. In the end I've had to swap to a cast type UJ. Various places supply them, I got mine from Motorsport Tools.