magnum A/C,Power steering and water pump Bypass belt

hello I am building a 96 SB Dodge Dakota to drag race with. I will be only using the Serpentine Alt belt. the water pump will be electric. so trying to see if anybody else has done what I will be doing. if you have do you remember the belt number? if not I will try and measure the belt out and post what I find out. thanks Mopar65