68 Dodge Dart with 440 Cooling recommendation

RPMagoo said
Your crank pulley needs to be larger than Your water pump/fan pulley. Sometimes, when changing motors, this gets overlooked.

Its a ***** tryin to find a smaller single groove water pump pulley on a big block that matches up with a standard lower pulley !
I found one " a guy on here" has, but it aint the same depth as my pully set up .