1 x AA5052 Aluminum Shroud. For 1930 1931 Ford Model A 3.3L Chevy V8 Engine. Cooling Thermo Fans& Relay. For 1932 Ford Model B With 3.3L Chevy V8 Engine. The fan shroud basically houses the fan blades securing it in place and keeping it from damaging the other engine components that may disturb the smooth and even operation of the engine.