[AcampoDave]

I used exterior grade plywood. 2 sheets split down the middle with the the original strips refurbished and layed on top. I cinched it all down with carriage bolts thru the top and used washers and nylock nuts below. This job was done with 5/8" because it doesn't haul much heavy stuff. I have used 3/4 before too but it makes the strips stick up just a tiny bit above the rear cross sill, which is fine as long as you remeber that and don't go raking a sheet of drywall or similar vulnerable cargo over the raw edges. Also, for anyone thinking of doing a longbed truck, it will need 9 foot sheets which are availabe at real lumberyards.