Before I painted my motor 3 years ago... I did quite a bit of reasearch to find the best stuff on the market. And found that Bill Hursch was the best.

It will out last any of the others, and has a higher temp rating. But ANY of the paints will burn off the exhaust ports on the heads and cross over on the intake if you put it on too thick there.

The key is to paint these area with just enough paint to cover the bare metal, and no more that that! the rest of the engine you can paint with several coats.

After 3 years, my exhaust ports are just turning colors and showing signs of burnt paint.

So it's all in the proper application. If you use something under the Hursch paint, most likely, it will cause it to burn off quicker, as the paint will be to thick over all...

Brett - 67 Drop Top 455!