The mountings I am familiar with are those that are on the manifold. While different from each other, my 1935 Standards and my 1936 truck both have mounts off the front two of the bolts that clamp the two manifolds together. Many 216 manifolds have a cast "tab" with two threaded holes, on the forward end of the intake manifold.

Mike

Well, it's cold in my garage, but I went out to see if the coupe had horns in front of the radiator and this is what I saw: There are two, one on either side. So, I wonder why they had another horn mount on the firewall??? I guess it really doesn't matter, but is certainly curious.

@35mike 

YOU my friend are absolutely and unequivocally RIGHT!

And I was WRONG!

Because I could wiggle the horns, I had assumed there were rubber bushings.

There are not.

Instead, the 2 thinner plates riveted to the main base and bolted to the horn are what provide the wiggle and some degree of sound isolation.

No wonder the horns are so loud in my cab that I'm hesitant to use them.  🙂

@jerry-berry 

It's cold here too, 13 degrees F below zero earlier this morning.

The 2 thinner plates between your horn and the base (and probably the horn itself) are the same as what I have, but base is different.

The base you have on the firewall is the same as mine.

I wonder if a previous owner thought louder horns would be a good idea and installed 1 accessory horn to the firewall, then later got tired of just how loud it was?

@ole-olson I was thinking the very same thing. I wish the horns were still available...would make a nice addition to talk about at car shows.

So I have been following along but haven’t commented. I agree with the earlier comments that 1941 passenger car horns were attached to the core support behind the grill.  That said, I checked the 1941 passenger car accessory brochure for additional horns, there were none listed. The brochure did list however, an accessory switch that allowed one of the core support horns to be turned off.  Mike

@michael-falise 

Hi Michael

I've assumed the same thing, that the accessory switch probably cut out one of the 2 regular horns.

The accessory dual horns were actually listed as a truck accessory as the cars already had them, but could of course be mounted on cars as well.

Here is a real quirk of the GM accessory world back then...

From 1942 to about '46 Chevrolet showed their top of the line heater as an accessory for the cars, but not for the trucks.

However, GMC offer the exact same heater with GMC badging as an accessory for their trucks, which had the exact same cab.

The original owner of my '46 Chev installed the GMC truck heater, but could have just as well put in the Chev car heater as it was the same heater.

@michael-falise Interesting. Someone must have decided the horns were indeed too loud.