This is exactly what I want to do with mine, except I'm thinking about just going with straight up amber instead of the switchback. The switchbacks look slick but I don't want to run HID in this truck without a projector retro, which I'm too cheap to drop the money on...and there's something that bugs me a little about two different shades of white light (white LED's vs halogen bulbs). So, amber it is. Thinking about trying the amber V3 Tritons from VLEDs, as they usually have a sale this time of year so I could get them a little cheaper.
Is it safe to assume that since the color changing for the switchbacks is handled by the bulb's internal circuitry, that the wiring wouldn't change at all with a solid color LED bulb?