Have you searched this forum for info on these companies? I recommend doing so if you haven’t. Lots of info to read.
Why not quigley?
Also look into expo vans, agile, and ujoint for other 4wd conversation options.
"understeer is when you hit the wall with the front of your car, oversteer is when you hit the wall with the rear of your car, horsepower is how hard your car hits the wall, and torque is how far your car moves the wall."