It depends on the quality of the chrome plating. No doubt it will discolor to the rainbow-like hue from the heat...plus, the cheaper it is, the easier it will chip. I too am thinking about getting the AA headers for my 67 conv. I've read on here that they give off a whole lotta heat. I would consider ordering the non-plated headers, then have them coated with a ceramic-type coating, ie. Jet Hot or the like. I've heard lots of good things about the Jet-Hot coatings, and they offer a lot of different colors and temp-ranges. The coatings help cut down on the heat that they give off, plus it would be alot more durable than just a spray-on hi-temp paint.