What color was your car?
my sister has a 67 Formula S fastback that was beige with black bucket interior auto on column (sure would be funny if it was the same car)
I ended up with the 273 hipo and 8 3/4 in my 67 coupe (my 1st car) and put a 7 1/4 in her formula S. All Hipo cars had 8 3/4" rearend as far as I know
I don't remember if her's had tack, I was thinking vac. gauge just like my 1st car and other sisters 67 coupe
Both Rita's and my 67 Formula S had drum brake all around
My 67 Coupe Formula S (different car) 4 speed had factory tack