Engine Knucklehead Panhead Shovelhead 36-84. Engines and parts. over 2000 engine parts from brand name manufacturers that include Cam, Cam Cover, Connecting Rod, Crank Case, Crank Pin, Cylinder, Cylinder Head, Dress Up Kit, Engine Mount, Flywheel, Long Block, Oil & Chemical, Oil Pump, Pinion Shaft, Piston, Piston Ring, Pushrod, Pushrod Cover, Rocker Arm, Rocker Box, Seals, Gaskets & O-Rings, Short Block, Sprocket Shaft, Tappet, Tappet Block, Tools, Valves. Knucklehead EL FL 1936-1947 | Panhead EL FL FLH 1948-1965 | Shovelhead FL FLH 1966-1984