I think that one guy is Mike O'Neill when he was young.
That was the year I graduated and I remember hating to see one of those in my rear view mirror.
All the dicks had plain blue ones--easy to spot, and our chevy 327's would leave those 390 fords in the dust--they would rather race you than give you a ticket in those days--
Who owns the car?
It looks like it is maybe a single channel Motran head. Kind of hard to tell because the horn ring is in the way. I thought DPD had 2 channel Motracs with the light sensor to dim the pilot lights, but maybe that wasn't until around 1967. Then later they had the kit put in them for 4 chs. It doesn't look like the original mounting bracket in the picture.