I have a 98 gtp. Im new to owning a supercharged v6 and was wondering if i could get some insight.

I have a short ram intake, 3 inch catback exhaust (no resonator) split off to 2.5 inch dual turbo mufflers, 180 thermostat, 8mm accel wires and am receiving a rebuilt supercharger snout with a 3.4 pulley on it tommorrow. Im going to put 1 step colder autolite 104 plugs on it and was wondering what kind of power and torque i should expect. Also with this set up, should i have knock retard?

Thanks 4 the help.....