I did like RockimusPryme said back when I had a '37 Chevy street rod. I was able to use a "Bitchin'" brand floorboard kit, but the process was the same. The panels were designed w/a flanged, overlapping joint and holes for rosette welds. The panels were held together with self-tapping screws that were removed and the holes filled in with weld when done.
After that it was seam sealer and primer time. The finished product was great looking and strong as can be. I also think the rosette weld procedure is easier and less time consuming.
