My truck is a 1939 ton and a half, you'd think I'd remember to put that in my posts.
Its has the original 216 and a 6v alternator (at least it will as of tommorow). I just put in a new harness from chevs of the 40s, this horn was an accessory so no provision for it in the harness, just for the stock horn(which I don't have). I should be able to post pictures of what I have tommorow. Thank you