Pulley size ? on cooling

I think I have it solved! Thanks @Rat Bastid , I gave CVF a call and they pointed me to the High Flow pulley on their site. It is just the 2 groove crank pulley. I guess if I ever want to put power steering on the car I would have the extra groove. I do wish they made the same size crank pulley in single groove though.

Chrysler Small Block Crankshaft Pulley 2V - High Flow