Ford manufactured the Bronco from 1966 to 1996 in various sizes and models. Until 1980, the truck had an 11-character VIN (vehicle identification number) that only identified the body model, the engine and the manufacturing plant, with a “build number” forming a serial number based on the date of manufacture. From 1981 on, the 17-character VIN information included country, make, model, year, body and engine information, manufacturing plant and a serial number. On early models, decode the VIN from a chart. From 1981 on, decode the VIN with free online services.
Compare the 11 characters of a 1980 or earlier Bronco to a VIN chart to decode them. The first three characters represent the series, the fourth character represents the engine, the fifth character represents the manufacturing plant and the remaining characters are the “build number.” For an example of a chart, go to the Westcoastbroncos website.