If anything you may want to install a headlight relay system to cut down on the amount of power loss the headlights see running through the switch. Then you can have the running lights on at the same time as the headlights. There are a few kits premade out there. But if you are handy with wiring then making your own system is ubber simple and cheaper by $90.
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Mark J. Covill
"I'm not handicapped, I'm handicapable!"
'64 F-100 Shortbed 460/C-6
'03 F150 Shortbed 5.4L/4R70W/3.55 LS
Author of the disc brake article for 57-64 F-100's