The mystery box next to the regulator

looks like the horn relay to me.

See photo of my replacement nos horn relay

@ photobucket

http://i669.photobucket.com/albums/vv57/glp0329/Horn%20Relay/HornRelayDelcoRemyGMNOS_zpse4007185.jpg

George
in
New Jersey


1954 3600
A big help to many on the Bolt
Now cruising in
The Passing Lane