Same setup was on a '68 b-cuda that I bought (/6). On the floor. I don't rememnber the resevioir type :( and doubt I have any engine bay pictures...
Anyway clearly it was still the standard through that year.
I see the 67 and newer electric pump goes in the reservoir and the tanks are different as well. The manual pump system reservoir has a nipple for the hose like the 66 and older tanks had.