Am I right on my Troubleshooting codes PO171 & PO174?

[Nodnarb76]

Well this past weekend, I replaced my regulator (used the C5 Corvette regulator/filter), inline filter and the gauge on my fuel rail. I still have fuel pressure in the upper 40's. I am now suspecting the fuel pump, the hose between the sender/pump. Or I'm not getting a full 12v at the pump.

I Should be getting 58psi at my gauge on the fuel rail with the engine running if I'm using the C5 filter/regulator correct?

I would like to post up some pics of the freeze frame data from when the check engine light comes on to see if anyone has some ideas.