PS-
I don't think you have to drill the hole before you finish the paint job on the truck.
When you do install the spotlight you will drill the hole and then mount flanges/brackets with gaskets at both ends of the hole, so any scratches or whatever near the hole will be covered up.
If you buy a used, NOS or other spotlight on e-bay you can buy just the install kit from Unity which will include the template, brackets/flanges, and gaskets/seals. Also, UNITY has lots of local dealers around the country who can do the install for you, when the time comes, whether you bought the light from them or come in with used Unity light you got elsewhere.
The reason UNITY has so many local dealers and such great support for these spotlights is that they sell them to many police and fire departments, ambulance companies and secuirty companies throughout the country.
