I have a mag mount on my old truck, just used a very thin piece of rubber under it and it hasnt scratched. Go to a good radio shop and they will set you up. You will have to have the antennae "metered" for length for optimum performance. I have found that the little "shorty" buggers dont do as well as a good whip if you want distance. And where it is mounted on the vehicle is a big thing too, best is up top and on the roof where it can shoot a signal in any direction using the truck body itself.