1991 Ford LA8000F Optional Automatic Adjusting Orifice Tube For Normal Climates Under 105 Degrees;. 1992 Ford LA8000F Optional Automatic Adjusting Orifice Tube For Normal Climates Under 105 Degrees;. 1993 Ford LA8000F Engine: 7.8L L6; Optional Automatic Adjusting Orifice Tube For Normal Climates Under 105 Degrees;.
