EARLY design has the return line in the center of the cap and uses 3/16ths inch return lines To 02/1992 8th VIN Digit: M
1991 Ford F-350 equipped with 7.3L V8 Diesel OHV
EARLY design has the return line in the center of the cap and uses 3/16ths inch return lines To 02/1992 8th VIN Digit: M
