How much lining area are in the front pads AND what composition of the friction material, front and rear? If the fronts are "GM D52" based, then there can be some good high-metallic pads to choose from, or even some great carbon-metallic pads. I would suspect these things should be on the Wilwood website under "Specs"? Once you get outside of the OEM realm of things, you are at the mercy of the supplier as to what is good or if their products are "universally good", by observation.
Are your concerns with the "first hard stop" or the "5th hard stop"?
WHICH booster?
If you feel you need "more pad engagement" to stop the car, you need better frictions to do that, NOT increased line pressure.
Especially if a rubber flex line might rupture from it! Braided stainless steel-covered brake lines can put a bit more pressure into the mix, from decreased flex line deflection, BUT they still have rubber inside of them to deteriorate with age. Not nearly as bullet-proof as some might perceive.
CBODY67