So my lights are flickering/pulsing...I looked in some threads and found that the voltage regulator is going out...So I might as well replace my alt since the regulator is inside. first off would a 90amp be any better than an 80amp, if the car has an upgraded sound system? and second is it a 5 groove or 6 for the alt. since on autozone it brings up three (1-80amp with 5 groove, 2-90amp with 6 groove)

2007 fit sport/AT (gd3)