Get the one sized for the weight of your motorhome, and the mounting kit for it. As someone who never really appreciated the "loose" feeling of the steering in Ford trucks and vans, the driving improvement is significant.
They are not hard to install, just need a good torque wrench, the correct sockets, and some cardboard to lay on.
-- I must be the last optimist on the planet
2018 Winnebago Intent 31P
Roadmaster anti-sway bar Front/Rear, Safe-T-Plus, SumoSprings-Front/Rear