I made a wooden frame to hold the dash frame durring assembly. I found that didn't like the frame since I disassembled everything upside down on a bench.
I just started the reassembly process last night. I put a thick blanket on the bench and will be reassembling the same way as the disassembly...upside down on the bench. A few things will have to be done right-side-up. Installing the VIN tag, the Challenger logo and the center speaker/grill.
The pad nuts(11 of them) are a special stamped steel nut. If you don't have your origonals, I don't see why a standard nut and washer wouldn't work.