Belt guidance

So the belts you have are 7480 and 7370. The first 7 is the width of the belt, the last three numbers are the length. 48” and 37”. If they are 4” too long go buy a 7440 and 7330. If the number is 7485 it is 48.5” long. There are a number of water pump pulley dia. A/C, non A/C etc.