ACWALSH8,
I think you need to look again at the pulley setup on these trucks. There is 2 seperate belts on our trucks, one is a normal serpentine belt that turns all of the accesories (water pump, alt, power steering, ect.). Then there is another belt that only turns the blower. Changing to a 8" or 10" or whatever lower SC pulley will have no effect on how fast the alt turns. Now as far as the lights dimming, I have a yellow top optima, I am running a JL 300/4 and a 500/1 and I get some dimming too, so I would like to know the answer to this question too!!
'03 Two-Tone #00664
Born on 11/25/2002
395 RWHP 493 RWTQ