Hate to revive this, but not really any other discussion on the subject anywhere else.
Why not just run the rack in conjunction with a ram assist?
I suspect the reason most guys start thinking about rack, is because you could run it with a triangulated front axle. You'd need a pretty ridiculous telescoping steering shaft, but I think that part could be done safely enough. So why's no one brought up just using the rack for show (legal reasons, as most places require a manual linkage for the primary steering axle) but let the ram do all the actual work?
I stick a ram on everything even if I don't need the extra assist, because it essentially isolates the steering gear from impacts.
https://www.pirate4x4.com/forum/general-4x4-discussion/1611002-ultra4-ifs-full-hydro-power-rack-pinion.htmlSimilar in U4 / Joe Thompson /Gomez Bros cars have a Saginaw box attached to a double ended ram. The ram ends are held to the front clip and the steering arms are attached to the body. The body moves back and forth...without rotating.
I believe swingers can be designed to minimize bump steer easier than a rack/ram.
All these systems have to be beefy. There is a lot of feedback from tire hits that want to push the swingers and racks around. Even the best racks have to be keyed into the bulkheads as 3/4" bolts will not hold them from moving.
Once you add a hydraulic cylinder then you have to feed it. A Toatl TT system runs about $7k including that $3k rack.