1962 Chrysler 300 Engine: 6.3L V8; 2 Bore Gasket; Open throttle bores;. 1963 Chrysler 300 Engine: 6.3L V8; 2 Bore Gasket; Open throttle bores;. Part Type: Carburetor Mounting Gasket. 1964 Chrysler 300 Engine: 6.3L V8; 2 Bore Gasket; Open throttle bores;.