These horns came off the original core support for this 70 I’m working on now. It has these odd horn brackets on it. Making me think they used special horn brackets to clear the charcoal can… ??
Ok I looked in the 70 assembly manual and it didn't indicate anything different for CA cars. I found two correct 491 and 492 horns in my stash. It seems odd that these have those weird brackets...since they are the correct horns. Oh well...carry on!