I have a 4 yr old 392 Ford Motorsport crate motor with Canton pan,
oil cooler NOT hooked up, and it takes 6 quarts to fill it .
Oil cooler must add at least 1/2 quart, or more ? Dunno for sure . I use 20W50 which was recommended by Ford on the paperwork that came with the engine . I also use a Ford Motorsport FL1-HP filter. Bill