My 70 beetle's running boards were falling off. Got a new pair then discovered several bolts were either twisted off or the nuts were gone, leaving ~5 X 10 mm slot. I don't see a way of getting a nut started on the inside, n haven't found any repair kits.
Got a fix? I'm not above drilling and taping a 10mm hole if that's what it'll take. Sheet metal screws ( body isn't very thick)?
Thanx chuck