I did a similar mod on my ride, and it's a game-changer! For the steering wheel horn button, tapping into existing wiring sounds like a solid plan. I went the straightforward route too, identified the wires, and bam—new button in place! Just a heads-up, be sure to check your local regulations to stay on the right side of the law.
As for your Camaro, if you're into DIY upgrades, ever thought about a
drill horn? Adds a unique touch and definitely turns heads. Also, consider tweaking the lighting, swapping out decals, or exploring performance mods.