Where is the crank case vent on a shovelhea harley Davidson?

Shovelheads, as well as early Evos andall big twins back to Knucks all use a rotatry valve timed to the camshaft. This resembles a 1 1/4"drum about 3" long with a portion of it screened. Later Evos and Twin Cams use the "Head breather" system with the umbrella valves.