Need more fuel pressure
 

I bought new 175cc injectors and the company I bought them from said I need to get 65psi

I have blue springed (OEM)

And have resorted to buying a new fuel pump. (Also OEM)
Before the new fuel pump my fuel pressure was bouncing from 15ish to 40PSI

With new fuel pump it's holding steady at idle at ~50 and under load from 45 to 55 (mostly 45)

I have bled it from top fuel filter until diesel came out. Also changed both fuel filters.

Any suggestions to get 65 PSI?

You should be getting above 55 with the blue spring. Check the fuel pressure gauge and make sure the air is bled out.

Can I bleed it out from the gauge it's self. Because I bled it out at the filter.

The line feeding your gauge must be bled also. I mounted a small gauge right off fuel bowl. U can tee off test port and use both if you want to be sure.