Corrections on my last post.
The NP210 regulator does not work. The jeep runs with it installed but still is flashing the P 0171 code. Further research showed it has a 35 psi working pressure, not the 49.2 psi needed.
Searched NAPA's website and they have a 50 psi working pressure fuel pressure regulator
NAPA Echlin Part Number: 2-19681
Will install it tomorrow morning and will report on results then.