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I read the manual for the data plates #6 x 1/2" screws for the dash and rivets for the 3 on the glovebox. I've seen some trucks with the defroster duct and guys either bought duplcate plates and put them on the duct or took them off the dash and moved them to the duct. The manual for the heater makes no mention so I assume that nothing goes on the duct - yes?

If I had the defroster, I'd leave it blank, just as the FED did?

In the AF, the data plates stayed where the factory put them. the only thing I ever saw on the defroster duct was stencilled on and read:
MAXIMIM SPEED
ON BASE 25 MPH
OFF BASE 50 MPH

Thanks guys! We are probably going to use some #6s on the glovebox with nuts versus trying to find a rivet gun and get them straight. Things remembered charge $76 to engrave the 2 plates so we don't want to make a mistake!

Lifer wrote:In the AF, the data plates stayed where the factory put them. the only thing I ever saw on the defroster duct was stencilled on and read:
MAXIMIM SPEED
ON BASE 25 MPH
OFF BASE 50 MPH

Typical...AF had heaters...none of the M37s I ran across in the Army ever had heaters...

pfrederi wrote:

Lifer wrote:In the AF, the data plates stayed where the factory put them. the only thing I ever saw on the defroster duct was stencilled on and read:
MAXIMIM SPEED
ON BASE 25 MPH
OFF BASE 50 MPH

Typical...AF had heaters...none of the M37s I ran across in the Army ever had heaters...

We had Defrosters & Heaters @ Minot AFB, but not @ Bucks Harbor AFS, Bucks Harbor, ME, our M-37 there was strictly for plowing snow.

My comm unit in Germany didn't have heaters in its M37s, either. Other outfits did, though.

The heater kit is typical of what you'd expect from the military. The manual is very straight forward and well documented. The biggest issue was how to install the blower unit on the fender. The knockout marks were way off so they obviously fit a previous version. The other problem was the brackets didn't line up at all with the angles on the fender-kind of like mounting it on the side of a hill. We'll take some pics if anyone is interested or plans on buying a kit from MWM.

All the issues you mentioned are issues with every one. You will want to fabricate a cover for the blower motor to keep water out, if you don't every rain shower or wash job will do it in.