1988 E250 van, does this van have an anti-slosh module for the fuel gauge in the instrument cluster? thought I would ask before I tear it all apart.

 

Not to my recollection, but Ford did use two places to provide voltage regulation for the dash gauges. The older vehicles had a voltage regulator on the circuit and the newer ones used the temp gauge to provide voltage control for the gauges.
Can we ask as to just what caused you to inquire about this?