Dick, I just had my Holley carb rebuilt by Bigs Performance and they apply what they call a platni-blast coating to the carbs. You can find them on e-bay.
You can get the carb finished in just about any color you want, I went with the factory Holley gold color.
As far as the intake manifold, I had mine ceramic-chrome coated. A very durable coating that can handle the hi temps.