If you are going to keep that Pontiac steering wheel don't put the wiring back stock.

Get a horn relay (6 volt, might not be easy to find) and wire it to run the horn using the relay.

You'll be glad you did.

1955 1st GMC Suburban | 1954 GMC 250 trailer puller project | 1954 GMC 250 Hydra-Matic | 1954 Chevy 3100 . 1947 Chevy COE | and more...
It's true. I really don't do anything but browse the Internet looking for trouble...