It depends on what your output pressure from your new mechanical pump puts out .
If it(your new FP) puts out 14 psi,then you just need a fuel regulator that is tapped into your manifold pressure/vacuum.
With that you can run roughly 10 psi of boost pressure.
If you are going to run more boost then you will need to tap into pump like the paxton pdf.
I ran the electric race Holley pump that put out 18 psi,then all I used was a Holley FPR like you already have. I only ran 8-9 psi w/my Paxton supercharger.
MBHD
