An easy rule by Coilover from and other thread.
I don't want to make it too simplistic but it is not necessay to find board widths from anyone, it's right in front of you. Just measure the distance between the bed strip bolt holes and bingo that is the board width. I usually use the rear crossmember because it's stationary. Good luck; Evan
Some things are simple, some don't.
Thanks Evan
Richard