Scott -
I am doing the same thing with my Firebird (kind of). The lights will shine directly through the grilles, but I am also working on a quick release setup just like Stuart just mentioned. I spoke with a buddy of mine who works at NASA. He said they actually use two alternative methods for doors and stuff on the shuttle:
1. Magnetic strips - similar to the kind that holds refrigerator doors shut and
2. Industrial Velcro - George de Mestral invented it, but NASA utilizes it on bunches of stuff
Either way, your car is killer.
P.S. Intercoolers are way overrated, just use a wet sponge !!