Im with FrankR on this one. Couple of problems with this. The first is the tilt kit listed seems all wrong. Accessory kit #173737 would seem to be the proper kit for a 1988 20,25, or 35 hp motor. Unfortunately that does not include your 28 Special anyway. Part of what made up your motor as a Special is the older type two piece gearcase & midsection. Even if this were the right kit it would not be for your motor. I’m pretty sure things are different on your model. Stern brackets, tilt tube, other geometry. If you look at the 1988 Accessories section on Marine Engine.com you will see as FrankR mentions the pump looks nothing like this setup.
This kit looks more like a tilt assist kit for a 2 or 3 cylinder motor of an older vintage. Just a guess, but that’s where you see those type pump & reservoir assy. Hope that helps!
Dan in TN