Paul; Two years ago I installed a horn relay from Davis Model A Parts 4600 W Jim Mitchell Colleyville TX 76034 This unit installs inside the horn and requires no external wire changes.It is fully insulates and needs no mounting (other than wire connections).It grounds to one of the internal bolts.Since it is inside horn it does not change the authentic look of your car. This is one of the very few add ons I would reccomend for an "A".Your sound is much more consistant & the horn never seems to need adjusting Jack
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