filter regulator

Early magnum days, trucks with the returnless fuel systems were having regulator failures,eide open pressure was somewhere around 175 psi.
Changed quite a few regs, could pop them in between tank and box floor.
58 should still be controllable via ecm/o2 sensors. The few extra wouldnt hurt if engine is chooched up a little...

I had a problem with my sister's jeep Cherokee and it's regulator mounted on top of the tank. They went bad about every 6 months. Eventually put a used OE unit in it from a salvage yard in and fixed it for good. It's been going good for a couple years now.

I can't remember what magnum application used the return style rail with the regulator built in. But I found a picture of one on Google.