I take it this is a wet kit and your going to pull off the fuel rail?
Here is what I'd do before replacing the pump.
1) Hook up a fuel pressure guage to see what's actually going on.
2) Replace the stock fuel filter with a stock metal replacement. And **drill out the rounded over ends** so that it's I.D. is bigger than the piping going to/from.
Or.. get an aftermarket filter setup if your just bent on spending money.
I'm pushing a 75shot now and this is what I do. (fuel filter w/drilled ends)
Everything else in the fuel system is bone stock.
Just pushing harder is not always best. Removing restrictions should be first on the list.