318 pulley mistake, need the correct size.

My crank pulley could be wrong too. That's why I need to find out what is correct for a 73 dart with a 318 with A/C and P/S. I could guess, but I don't want to have a pile of pulleys that don't work for me.
3751126, 2-1/4 tall (probably 2-1/8 deep), 5-3/4 od. Good luck!
OEM Mopar Upper Pulley for water pump Plymouth Dodge PN 3751126 340 Non AC | eBay