Who makes a great "high heat" paint?

I used VHT on my cast Oldsmobile intake manifold when I removed the carb for a rebuild (removed the intake too just because it looked dirty (just an excuse to paint it). Following the directions...I used the VHT primer and then applied the VHT top coat (gold). It roasted right off the heat cross over in about 30 seconds. I was not happy. I think we are going to use the POR15 Chrysler Blue on my sons 360 Duster project. I've heard good things about it.