I have a bad kink in the hard return and hard supply lines under the driver seat...
What would be the best way to fix?

I have this regulator Aeromotive 13107 and i wanted to know if the fittings that are screwed into the fpr for our quick connect lines can be removed and replaced with some AN fittings so that i can run ss braided fuel line back to the filter and tank...
Which will keep me from having to make 2 flanges...

using these...

 

That appears to be the LT1 rail-mount AFPR. A word of caution.... I have seen at least 25 people have problems with that AFPR. It is a disaster. Unlike most Aeromotive parts, it is simpy unreliable.

And the outlet of the fuel pressure regulator does not go back to the filter. The filter is on the fuel supply line from the tank/pump to the passenger side rail. The FPR, held in the back of the driver's side rail, connects to the fuel return line that goes directly back to the tank.

As far as removing the fittings from the AFPR, there is only one fitting that connects to the hard return line. The other fitting pushes into the back of the rail. As to whether the fitting for the hard line can be removed, I have not seen the Aeormotive regulator close up, so I can't help you there.