Inspection marks in engine bay

There are varying levels of restoration. Are you going for a "100 point" resto? Unless you are hoping to commit to that (and have already been doing that in previous work) then the presence of inspector marks is cool but not worth saving. If you like them anyway, then photograph and re-create. Those who really do resto's will see these at car shows and laugh knowing that this is not a real resto. Build your car your way.