There is this diagram;
https://www.ford-trucks.com/forums/a...6&d=1218602346
And this I quote from our resident Ford parts counter guru Bill.
Originally Posted by
NumberDummy
D5TZ-9189-B .. Fuel Tank Selector Valve
6 ports / Marked: E57B-9F271-BA
Fits many different models and engine sizes 1985/91.