I'm re-building a 8BA Flathead and I'm wondering if dry film lubricants or thermal barrier coatings would be of any benefit to a flathead or any other engine for that matter. I ran across a turn-key flathead site that uses a thermal barrier coating on the intake and exhaust passages. Is this just a sales pitch?

What about dry film lubricants. I'm rebuilding original Johnson adjustable lifters. Would there be a benefit to coating them? What about valve stems, cams, or other engine parts?

I'm just gathering information for this and future builds and I'm fishing for information.

Thanks,

AndrewB