MountaineerTom
LJ Enthusiast, Retired USAF Weapons Loader
Supporting Member
Ride of the Month Winner
...installing a Cherokee fuel rail in order to get a Schrader valve that many years are missing,
While this isn't a part from another vehicle, you can get this MOPAR 6539A hose and temporarily hook it up to get a fuel pressure reading. I haven't used it yet, just bought it and stashed it away when I came a cross it. You could probably make one relatively easy too.