SHELBY GT350 5.2L V8: ENGINE VALVE COVER GASKET FAILURE CAUSED OIL LOSS AND FIRE IN ENGINE BAY--OIL BURNING ON EXHAUST MANIFOLD. SMOKE UNDER HOOD AND INTO PASSENGER COMPARTMENT. CAR TOWED TO DEALERSHIP WITH MANUFACTURER'S ROADSIDE ASSISTANCE. OIL SPRAY FROM VALVE COVER GASKET ONTO EXHAUST MANIFOLD WITH MEDIUM RPM (~3000 RPM) AND HIGHER.