Should be NO front suspension at all.
We used a L100 push pull rack n Pinion steering system on our older STX-38's.......that was MAJOR fabrication, and took quite some time to make.
Look at Richard Miller's # 811 in Mod XR class, he has one of my old mowers. I believe he said he may be down there at Dublin.
Burgundy STX38 with hood scoop. Took Rick a little while to get the feel of it, he does very well now. The STX Chassis great for slower speed classes. The Drawback is a stamped one piece frame....if something goes wrong, the entire chassis has to be replaced, this is why we got away from making racers from this series and moved to the L100 series, or the older 160-180
series that were bulletproof.
Rack & Pinion wil not be legal in USLMRA