Yeah I cannot speak to the rack conversions.
The only one that I would use, is the TCP system, which is about $2500-3K
I am using the Borgeson conversion. From talking to the tech support, I believe it's a converted GM box, that's been resplined. It uses the factory (manual steering) pitman arm, and unlike the rack conversions, does give you full turning radius.
I used a Summit chrome gm style PS pump $150 +/- with a v pulley.
It's been trouble free, and has more ground clearance than the racks (my car is very low)
The rest of the suspension;
Cut BB springs, opentracker rollerized perch
TCP upper and lower control arms
Arning drop
Baer bumpsteer kit
RT strut rods, Bilstein shocks
My own home built eccentric eliminators
I do my own alignment, with a laser and an agressive camber and caster
BTW when I discovered a slight leak, in the first box, Borgeson took the other one back and air-freighted (express) the replacement box. I had it in 2 days.
I made my own braided lines.
I am using the shallowest oil pan available for the FE (keep in mind my engine is lowered 1" to lower the center of gravity)
The TCP rack, would be the same elevation, as the bottom of my pan, so you can see the ground clearance issue, on a lowerd car. If you are stockish ride height, it should be okay.
Good luck