What trucks got heat stoves in 1969?

[IronCanine]

69 1/2T automatic

[Steeveedee]

My early '70 3/4T with a 402 BBC and 400 THM has the vacuum valve in the snorkel, but no pipe or sheet metal around the DS exhaust manifold. It has an exhaust manifold with no AIR fitting attach points on the driver's side, and an exhaust manifold on the PS with plugged AIR fitting attach points. I met my wife in 1980, and the truck hasn't changed in that time, to my knowledge (except that my FiL got it painted and the shop didn't paint the part below the lower molding white like it was from the factory. I busted his chops over that, and he busted mine back. Not my truck! I realize that mine is a '70, but I guess that the factories did different stuff at different times. FWIW, I worked on spacecraft for many years, and while they conformed to the electronic communications requirements, mechanically they could be quite different, within the design parameters. One spacecraft program I worked on was spin-stabilized, and every one of them got balance weights in different places.

[IronCanine]

Steven...after collecting pics of original examples for a while, I think it's safe to say that only 1/2T automatics got heat stoves in 69. No 3/4Ts (likely because they'd lag on emissions standards). No manuals (which means no 4WD trucks). Blazers were later in the model year, so all I can say is I haven't seen a 69 Blazer Auto (all were 4WD in 69) with a heat stove.

By 70, they all should have the heat stove. While it's possible you could have mismatched manifolds from the factory, I think it more likely an exhaust manifold came off at some point and the heat stove tin (as is often the case), did not get replaced.

[Steeveedee]

The engine and trans were rebuilt about 25 years ago, so those parts could have been left off. It's a CST but the windshield doesn't have the stainless trim in it. If the windshield had been replaced, knowing my FiL, he would have told them to leave it off. That was possibly done, since the old gasket had no provision for the trim. I replaced the gasket when I pulled the windshield to clean up and paint the roof.