Rance,
I PM'd you on the fuel sender.
On to the bed wood...
Instead of drilling holes in the wood you slaved over, just bolt the bed crossmembers down first, then clearance the bottom side of the boards in question just enough to allow the boards to lay down flat.
To do that, lay in all the the boards after bolting the frame down, position them where you want them and smack the board over the bolt heads lightly with your fist, that will mark the area to clearance.
I repeat lightly. I smacked one pretty hard.
Just one. Ouch. eek
Flesh heals, wood don't.
Finish the rest of the install as usual.
Pictures if you would like them.
Take care,
Mike