FordPartsGiant.com offers the wholesale prices for genuine 1984 Ford F-150 parts. Parts like F150/350 And U150- Exc. F250/350 Under 8500# G.V.W. - W/O Purge Vent Valve are shipped directly from authorized Ford dealers and backed by the manufacturer's warranty. Parts fit for the following vehicle options. Engine: 6 Cyl 4.9L. Transmission: 3AT C5.