I broke the Fan/alt belt today - what are you using on your car?

I have 2 on the Water pump, using 1966 273 ac pulleys... car don't run no more than 185 in the middle of summer in Tampa. And yeah I had the same thing happen you did first time I took my car out and nailed it. The kicker is evidently they didn't make a belt for my exact size so I have to use a universal belt for an air compressor to go from the alternator to the water pump to the crank the other one goes from the crank to the water pump to the power steering I like having two on there it's cheap insurance I'll tell you what those aftermarket Universal belts suck