do the big three,remember bigger is always better[use 0 gauge wire] get rid of that optima,crap,get a kinetik hc 1800,then if you still want to do your alt , cant hurt.if your drawing that much power fron your electrical system, sooner or later your alt WILL FAIL ,usally your stock alt is only powerful enough for the car and all stock systems with maybe a little extra reserve, especially on the newer cars and trucks.i have a s10 and ive blown my alt with a rf 500a2 and with a t1000 .