Quote: However, the rocker panels aren't thick gauge steel.
Here you are wrong, on my 70 Challenger the rocker metal is much thicker than the rest of the sheet metal. I know because my rocker had a big dent and I cut out that section to put in a replacement patch. The patch was regular sheet metal thickness and I ended up beating my original section straight and welding it back in.
Take care, Rick 68 Coronet R/T 440 & 68 Charger 528 Hemi,and 5 Challengers! 6 cyl, 318, 360, 383, 451
