I thought this bit was interesting in the 1930 cattle dog ...
"Many car owners will want you to convert their engine into a downdraft job. Unless
the manifold on the engine has been originally designed for downdraft carburetion, your
factory recommends that you leave these special “converting jobs’ alone. First of all,
you'll waste more time cutting up the old manifold than you can get money out of the
job. Secondly, to gain full benefits from downdraft carburetion, a specially designed
manifold is really required. Because the mixture flows down-hill, the downdraft man-
ifold is larger in size. This increased capacity means that more volume of mixture can
be put into the cylinders. So as a natural result, a downdraft installation on a conven-
tional manifold cannot show any appreciable gain in performance over the standard up-
draft Winfield installation. You need a special downdraft manifold to get the full value
from downdraft carburetion."
Also, earlier on it says the Winfield carbs are a "beautiful bronze finish".
