Fuel Line Routing and Clamps

[lsuguy]

I am getting ready to route a custom 3/8" hard line on my 69 Camaro. I plan to run hardline within a couple feet of the fuel tank and fuel rail on my LS3.

How are you guys securing the fuel line to the floorpan of the car? I plan to use either billet line clamps or cushioned clamps but I am concerned about drilling holes into the floorpan. Maybe its a non-issue but just wanted to know what everyone was doing. Any pictures or advice would be greatly appreciated.