They would be fine to run (so would your RWB ones if in new condition) the thing is that most cars restored to that level rarely get run, or just on and off trailers. Most guys I know that do drive thier highly restored cars only put the NOS green filters on for show duty and run something else the rest of the time. The reproductions are great for guys who don't want to mess with swapping filters and want to run a quality modern filter without giving up the appearance of originality. These reproduction filters are NOT for an all out O.E. Gold effort (only NOS will do for those) but for everything else they are great!