Thanks, guys, for weighing in!
I was going to ask what the difference might be between A & B?
Gary, i would guess the running boards would match up to front fenders properly up front since i think there was only 1 Tonner front fender for both trucks...However, since rear fenders are different between Tonner Express & Tonner panel they MIGHT bolt up in a different manner? I have stumbled upon the question after having a friend & good FordBarn member potentionally looking for a passenger running board.....