Looking for some guidance from the hive here. Picked up a really nice restorable box for my 97 C1500 project truck. Cab is mounted on a freshly painted chassis, so I'm not going to let anything crappy touch it. Question is, what would you guys do as far as the bottom of the box and the crossmembers on this box before setting it on the frame? Any suggestions on product or process? Plan is to do whatever I'm doing to the bottom of the box first, then flip it and put it on the frame or bucks to do the rest of the work needed. Appreciate you guys for any info you can give.