The Model A Engine-Chassis Manual, compiled from Dyke's Encyclopedia, claims 128 lbs at 1000 RPM. I don't know where that number came from. Ron Kelley dyno tests (
http://www.amuffler.com/dyno/dyno1.htm) has 77.3 ft/lbs at 1000 rpm stock, and does not get up to the Dykes number range until he put on a B head with 5.4 CR and bored .125 over, enlarged ports, Mallory ignition and a "mild" cam. (Test #6)