i was thinking, and ive had alot of NOS parts throughout the years and i cant think of when brackets were included, everything is ala carte. but, these red/black bakolite water valves come with brackets. had me thinking why. best guess is because they were to replace the 1 piece valve used on 1970 cars maybe????
i wish someone could find an original 1970 road test of a e-body with air conditioning to show for sure