383 Stroker Blower Motor Startup210cc Runners, 64cc Combustion Chamber, 2.02 Intake Valves/1.60 Exhaust Valves. These heads work great on both Carbureted and Fuel Injection engines. Sbc aluminum heads 210cc runners small block chevy 350 383 400 free shipping also included but not pictured is rocker arm studs & guide plates.