What size is that actual size for this pulley with the crankshaft? I have tried 37-x/x range up to the gates 7140. It’s still loose for some reason. I’m trying to figure out what’s the size I need since the belt has a looseness to it. The power steering is 5-5/8 and the crank is the 231 which is the 3 groove. It’s loose on the 1st and 2nd groove. I’m currently doing a swap from 231 to 350. Any belt numbers would help. Thanks.