The overall width of the boards is 6 3/8" with the exception of two of the most inner boards and they measure at 5 3/8"
The lip is 5/8" in from each edge with about 1/8" of material removed.
I don't know how these boards will fit because they havent been installed yet. When I took apart the box I measured the old boards and wrote everything down but I don't know where that paper is (10 years ago)
The original boards had a weird shape milled out at each edge unlike the boards I have which have straight cuts
As for the lengths, I could get you the length of the longest boards but the rest would be impossible to describe because they curve around the wheel wells