The original 6V relay may work, but may eventually burn out the coil. If the horn stops working, then a 12V relay (available from the usual suspects - example) would probably fix that up.
Kevin 1951 Chevy 3100 work truck Follow this saga in Project Journal Photos 1929 Ford pickup restored from the ground up. | 1929 Ford Special Coupe (First car) Busting rust since the mid-60's If you're smart enough to take it apart, you darn well better be smart enough to put it back together.