There was a E1TZ-1130-C that had a Fawn painted center as well.
The E1TZ-1130-B and C was not used on the 1980/1981 F-Series, or the 1980 E-Series, or 4X4s.
TYPE 6: Mag Type 16 1/4" 2WD F-100/150 : E-100/150
1978/80: D8TZ-1130-A: Argent: RB: E1TZ-1130-A :
No NOS Found
1981/86: E1TZ-1130-A: Argent: RB: E7TZ-1130-E
2 Found NOS at Green Sales
2 Found at NOS Part LTD Waxahachie, TX
1987/95: E7TZ-1130-E: Argent
5 Found NOS at Green Sales
2 Found at NOS Part LTD Waxahachie, TX
1981/89: E1TZ-1130-B: Medium Blue
5 Found NOS at Green Sales
1981/89: E1TZ-1130-C: Fawn
1 Found NOS at Green Sales
Truck: 1981 F-150 Explorer / Engine: 300-6 California MCU Feedback System / Trans: T-18 - 4 speed / 2.75 Ford Rear Axle Open Diff.