I'm looking for belly pics of survivors that show the heater connections for a /4 - so far without luck. I know the exchangers and muffler were painted gray and believe the heater parts (flappers, warm air guides, connector pipes, and j-pipes) were all black but need confirmation. What do the experts say?

Not my pic and much more focused on the exhaust end but all things are "right" on this one (saved this pic long ago, likely from this O&H forum). You can see the heat related stuff is black up front, along with the warm air guides.
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Warm air guides and J tubes are black, heater branch pieces are gray

Awesome! Thanks! I'm glad I asked because I would have done it wrong.