I recently bought a 98 F150 XLT and want to put some nerf bars or some other type of step up on it so that it is easier to climb into. Where would these attach? On the cab or on the rails? I noticed that the rails have a lot of predrilled holes in them under the doors, which makes me think they attach here, but the rails sit about 1 foot in, which seems kind of far away...

Any insights appreciated.

98 Ford F150 XLT
68 Triumph TR250

When looking for a reason as to why things go wrong, never rule out sheer stupidity...