Conversion with strada cranks, bb question
 

So i have an old univega frame that i'm building up to be a conversion. I have some Campagnolo Strada (iso taper) cranks that are just sick and i would like to just throw them on my frame, i just am totally confused about what bb i need. I know I need a 68 shell with english threads. The problem is finding the spindle length. I think that a 113 or 112 would be perfect, but the only bb with a iso taper that i can find is 110 and 115. And this is without spending less then $50. Dose anyone have any recommendations? Would 115 or 110 work?