Anything from 87 and up ford will be fuel injected. So try a 85-86 ford f150 with a 5.8l since they were carbed. Most the 5.0l equipped truck from 86 i have seen have been fuel injected so try to get a tank from either a 6 cylinder equipped f150 or a 5.8l f150. Take a look on lmc's website for a tank of that year and model. It should be a 19 gallon steel aft rear axle tank.