Installing the TorkLift GlowStep Scissor Steps # TLA7802-8000 on your truck bed camper will be similar to installing them on a trailer. The mounting bracket connects to the camper just under the doorway and the steps connect to the bracket.
I've linked the install instructions for you. view full answer...
Torklift steps are going to be just a bit wider than your desired 20" wide mounting dimension at 21-1/2", and the Brophy steps will be just a bit under at 18-1/4". Both the TorkLift GlowStep Stow N' Go Scissor Steps # TLA7845 and the Brophy Camper Scissor Steps # AS05 will fit your 43" entry height and are removable.
Of the two the TorkLift steps are the more stable option. They include landing feet for more ground stability and are adjustable to fit uneven terrain. These steps include... view full answer...