Did my 49 gmc 150 with the help of my dad. I gave himall the measurements in one of those previous posts and the board width was correct but the groove measurements were not in my case. Not sure why but dad was slightly angry when he had to re-do all of them. He did it on a table saw with a dado blade and i just used cheap pine from home depot that I painted black. Im 100% happy with it. I put quads, bikes, wood pellets, pallets and tons of random engines and transmissions and parts in the bed and its held up better than expected.
