PULLEYS

what are you guys useing for pulleys???..i cant keep my belt on at WOT.
i want to switch to an alum rad and elec fan/fans but i still need a belt for the alt.

HELP!!!...its really pissing me off!!!

took my dad for a ride in it last night and it came off twice!!..he did say"WOW..ITS PULLING GOOD!!"