What trucks got heat stoves in 1969?

[IronCanine]

Originally Posted by HeavyHauler

I remember reading some literature that said automatic trans equipped trucks received thermAC vacuum module on the air cleaner and the preheater from the exhaust manifold but four speed trucks did not require that emissions equipment.

That may very well be the key with the 1/2 tons. I have no evidence to the contrary. The Burgundy K5 that leads this thread appears to be a manual truck and does not have a HS. 3/4T and 1T may not follow suit because of differing emissions standards. Here's a 69 Longhorn(green) auto without...and a 69 1/2T auto (apparently) with.