Yes the pump may be an old Pontiac version, though not the correct one for a GTO/Tempest. The bracket sure looks like it mounted to the water pump of a small block Chevy. I might be able to change the pulley and bracket till get it to work, except I am leaning to get a Lares rebuilt 66 Pontiac version along with new hoses from Rockauto.It is called a stove pipe steering pump. Thay came out on cheve and Pontiac. Thay are old ones.
Yes my book arrived Friday.the return fitting on a pontiac is not in the center like the one shown
I do have a couple correct 66 power steering brackets...
a rear big bracket
and the large front bracket ,,, no slim top bracket
and i have alternator to thermo housing also
also have a nice original pump and nice reservoir and correct cap
NO pulley sorry