I don't know anything about this product but you might contact these guys:
https://www.millworkshotrod.com/prod...=7263515082797
Early Ford Dual Master Cylinder AV8 Adapter Kits 1939-1941 Ford Passenger and Light Truck, 1946-1952 Pick Up
This kit allows you to run a dual master cylinder on both 1939-1941 Ford car and light truck pedal assemblies as well as 1946-1952 Ford pick-up pedal assemblies using the stock push rod and boot. The kit includes a Made in the USA adapter and hardware, upsized brake fittings as well as a brand new dual master cylinder (not remanufactured). Perfect for your AV8 conversion.