1949 GMC FP152 Engine: 3.7L L6;. 1950 GMC FP152 Engine: 3.7L L6;. Compatible Years: 1949 1950. Part Type: Carburetor Mounting Gasket. Carburetor Gasket. Ensure that this part fits your vehicle by entering your vehicle's Year, Make, Model, Trim, and Engine in the Compatibility Table.