Hey guys,
Thank you for your help with this.
I confirmed that Grigg is right about the boards themselves are not the same for big AD trucks and 1-ton. The part numbers are here, I think, although digging through the master parts catalog if you haven't done so is a bit tricky to say the least. I think this is the appropriate page
here (??). I couldn't find the numbers for the running board supports, but maybe somebody has a keener eye than I do.
I actually have a nice set of the big bolt running boards here and compared the two once I had them off the truck -- photo
here -- for one, the vertical section of the running board, where it curves up from the horizontal step, is taller on the big bolt version than on the 1-ton version. And the mock-up looks tolerable (
here and
here), the fit is just way tighter than it should be, and the back end of the running board probably sticks out a little further than it should. It might work for my truck, which is a beater.
My 3800 was a ranch truck that is pretty beat up in places, including the running board supports -- I think only the front supports are salvageable. So I'll post an ad for short 1-ton running boards and rear supports (L and R) in the parts wanted section and see what happens.