I got lucky yesterday and a monsoon rolled through and lowered the temperature enough to paint the engine. I jumped on the opportunity and got some primer and color on it. I used Hirsch Auto engine enamel that resists heat up to 700 degrees.
http://www.hirschauto.com/ I didn't have to use primer but I wanted an extra layer of protection. The color is as close to original Pontiac blue that I've seen in an engine enamel. It's so good to finally see it back in color! I'm expecting the push rods today, once those are in I'll be getting ready for the install.