New old stock 1950s Vintage Ford Front Upper Engine Mount Insulator part number B5S-6038-A #464329 1955–1957 Ford Thunderbird: Fits models equipped with the 292ci or 312ci Y-block V8 engines.1953–1956 Ford Trucks (F-100 to F-600): Fits both 6-cylinder (215ci, 223ci) and V8 (239ci, 256ci, 272ci, etc.) engine models. This molded round rubber and metal component absorbs engine vibrations and prevents harsh metal-to-metal frame contact.