No, the boards are tongue and groove Doug/Fir 2X6 (car decking). I sanded them and then applied two coats of a full body black stain to all sides. I don't foresee this being left out on the weather a lot, so I didn't see the need to use treated wooded.
Next up is loading the car. I rolled the deck back and lined the car up to check if the front valance would hit before the front wheels started up the ramp. I was pretty sure it would because it has on every other ramp truck that I have loaded it on and loading a Pantera backwards is a real bad idea. Wind gets caught in the back vent opening and will flip the rear deck over the roof of it. When I bought it 18 years ago this had happened, and I had to do some significant repairs to the roof and the back deck. After seeing it wouldn't go up, I pulled the two center panels out of the deck and hooked them in the slots on the rear of the ramp. Then rolled the Pantera on them almost level and hooked up the winch cable to the axle straps that I had hooked around the frame and snugged it up. Then I raised the ramp until the ramps were in line with the deck. From there I just winched it up the deck and strapped it down with the 4-point system slid the ramp/deck panels back in place raised the deck and I was ready to head out.