I thinking of upgrading my Aeromotive fuel pressure regulator and changing the pressure up about 7 psi from where it is now. By doing this will it need to be re-tuned?

 

What will 65psi do for you that 58psi isn't?

 

Right now I am at 43.5 psi for the ID1300s. My FPR is messed up right now so I will be upgrading and my last tuner had it set at 55psi (new tuner tuned it down to 43.5). I've been reading that some gauges are off and so 55psi would give me a bit of a cushion I would think if the pressure decided to drop, without being overkill.
I'm not sure if It would need to be re-tuned for the change tho.

 

Yes, it will need to be adjusted.

 

Generally, with 43.5 base, that give you more cushion up top than 55 or 65 base. Look at some fuel maps and you will see what I am saying.