Can you take out the reservoir in an 88?
Ok first, its there for a reason! Those Ford designers and engineers know what there doing.
And second, Hell ya you can take it off! I have/had a dual tank setup in my 88 and I hardly ever used the rear tank. The last time I filled both tanks I noticed the rear tanks internal fuel pump sounded allot louder... that is until it stopped working! Decided not to do a new internal fuel pump and filter for the rear tank. So I did a little customizing and modifying and eventually I lost the rear tank and its pump and filter assy, rerouted the return line to the front tanks fill neck, and of course lost the reservoir and put double barbed strait fittings in its place.
After I finished I thought... I wonder if those Ford Guys new what they were doing? 2 fuel tanks, 2 internal fuel pumps and filters, a inline filter between the tanks, a reservoir, a inline HP fuel pump, and another inline filter. They were doing to much thinking!
Yes you can take it out, Yes it will run, NO I dont advise you to do it! I dont know your truck so I cant/wont say its fine to take it out. But with my truck I've had it out for over 3 years with no issues. I hope this helps you/someone.