The '68 Side Markers would be fine for passing PA State Inspection.
PA doesn't give a crap if the parts are original (or even for a Mopar, he could use ford lights and they wouldn't care) as long as they function properly.
The only time he would have to worry about originality, is if he wanted to tag it as a Classic/Antique vehicle. Those applications go through a screening, sometimes they nitpick, other times they don't notice mods
