Part Type: Engine Coolant Outlet Gasket. 1970 GMC G35/G3500 Van Engine: 4.1L L6; Molded Rubber With Plastic Carrier;. 1971 GMC G35/G3500 Van Engine: 4.1L L6; Molded Rubber With Plastic Carrier;. 1970 GMC G35/G3500 Van Engine: 5.0L V8; Molded Rubber With Plastic Carrier;.