I didn't find anything using the search so I am asking: I have a 71 Chrylser with a 440 engine with A/C. So there is a double belt driving the A/C-compressor and the alternator. I replaced the faulty alternator with a remanufactured unit. I assume the alternator I replaced is the original unit. When I compared the two alternators I noticed that the pulley diameter of the original unit is larger in diameter (a little over 3" outside diameter) than the pulley on the remanufacured unit (a little under 2-1/2" outside diameter). After I installed the new alternator I was tightening the belts when I noticed that the adjusting bolt on the alterntor is all the way at the end of the corresponding slot in the bracket. The entire setup works (the alternator very nicely charges the battery) but but the belt tension could be higher. I must admit that the belts look okay but pretty old so I should be replacing them soon, anyway. All listings mention a set of two 59" belts for this applications. I would like to know if someone of you already had the same issue and how you addressed it: Should I buy 59" belts or should I buy belts that are a little shorter, now that the pulley is a little smaller, too? I would like the possibility to readjust belt tension should the belts lengthen over time and I do not want to change the bracket. Thanks in advance for your help!