kiwi: What do you mean "Ford plug"?
as far as Unisteer goes, I have a power kit on my 66'. Its snappy, but makes a funny vibration when turning sharp at slow speeds. The bracket relies on the cross-member bolts, and im a little wary of the quality of Ford nut-serts. I'm going to take a video to show that the rack rolls in the pitch-axis as i turn the wheels back & forth in my driveway. i might weld in a support bracket to keep it from fatiguing the metal around the nut-sert weld. hate to have it come loose.
Tips during the Unisteer install:
be carefull to not over tighten the hydraulic fittings. they will crack if yo tighen them too much.
make sure the fittings are installed on the correct pressures. it can be confusing which way it goes, and it will be damaged if you install the lines wrong.
you may need to replace the banjo fitting on the pump with an elbow to route out the line.
i'm 6'6" and have long legs. i used a longer shaft between the two u-joints and moved my column out for more leg room. (cheaper than buying a tilt column) this will require drilling a small hole in the column and machining a notch in the shaft.
overall, its a decent kit for the money. TCP costs way too much for my wallet. I had a few headaches getting it all to work, but its better than paying $3000 for steering.