Thanks for all of the replies and input!
The manifolds have been blasted and are now coated with high temp paint. If I wasn't working on the truck with a small budget I would seriously consider ceramic coating, but for this project I can't justify spending that much on those parts.
My next question... would it be a bad idea to bake the manifolds in the kitchen oven to cure the paint? The instructions say that's one way to cure the paint and since I'm not going to have the truck running for awhile I would rather cure the paint now than later. Are there any hazards to doing that in an oven that's used for food?
Oh and Stuart, thanks for the suggestion to check how straight they were. Fortunately they are dead-on flush but I had forgotten about checking them!
