Yes, more pulleys equal stability but you can go crank to alt with out throwing belts, it's called alignment and not just an eyeball look. Use a straight edge to project a line from your alt down to the crank, move your alt in or out till you get a straight line. Another couple of things to think about...........what is the size of your crank pulley, and your alt pulley...........larger crank pulley than alt means you are driving alt 1.5 to 2 times faster than crank speed......what's your alt turning at 6000 rpm on the crank? Slow your alt down. Does the armature of your ride on bushings or ball bearings? That will cause problems as bushings are not too stable at rpm and they cause drag big time.
Good luck!
