According to "Vees for Victory" page 150, some were powered by V-1710-63(E6) but most were powered by the V-1719-83 (E18) The V-1710-63 used 8.80 supercharger gears.
A chart on page 430 shows two V-1710-67 (E8)s as being built, or same engine rebuilt. One had a 2:1 reduction gear and the other a 2.27:1 reduction gear.
946 of the V-1710-63 engines built
1,034 of the V-1710-83 engines built.