A '97 to '98 4.0L SOHC has the fuel return line and uses a Fuel Pressure Regulator part # 97JF-9C968-AB
The topic I linked previously shows why the OHV version won't work due to a different fuel rail with mounting differences - You "might" be able to get the OHV regulator to work if you made an adapter plate and added a fuel hose since the OHV version uses a removable hose as a separate part #, but IMO you'd want to be good at metalwork because you don't want a fuel leak on top of the engine later. It's the kind of thing an insurance company would not like.
That separate hose could be the original hose you cut off to reuse if it's in good shape still, or a new one with a Ford fitting added to the end. Possibly you could get that separate hose part # for the OHV regulator and use it, or not.