These with the Offenhauser heads were quite the rage
back in the 1950's. It looks like dual Stromberg 97's Too.
These basic motors had quite a long run, I believe (and someone
correct me if I'm wrong - from 1932 until 1953 or so). They made
the early fords very fast for an economical vehicle, and were quite
popular in early "Hot Rods". There was even an overhead valve setup
for them made by Ardun, which technically made them not "flatheads" anymore.