Thanks for the info! Also the smallest one is the idle pulley yes? Could i possibly leave out that pulley and leave it oem? As iv looked up a set of second hand ones but the idler might have been skimmed down therefore offsetting balance a little or would that be ok to put on?
The smallest pulley is the alternator pulley. You don't need the idler if your rubbing a Rev up.
I wouldn't personally as I don't like under driving the alternator. Are the groves still there for the belt? You might be ok but it sounds a little to ghetti mod to me.