Reproduction main gas tank fuel level sending unit for 1973-79 Ford F-100 F-250 F-350 truck models with mid-tank (Except 1974-79 Super Cab models). This sending unit installs in the original fuel tank mounted midship to the frame. Includes gasket lock ring and float. Ford Applications:1968-1969 Ford F-100 F-250 F-350 (with Auxiliary Under Cab Tank)1970-1972 Ford F-100 F-250 F-350 (with 21.5 or 25 Gallon Under Cab Tank)1973-1973 Ford F-100 (6 cyl. 240 8 cyl. 360/390 From Serial R20001 8 cyl.