408 Magnum stroker running hot.

Pulley sizes make a big difference. If too much flow it wont cool. Slower flow give coolant time to cool down in radiator. What size crank and water pump pulleys do you have. Also I'm not an expert on pulley sizes and such but know it's important that is why I'm throwing it out there. I'm sure someone will chip in on what sizes may or may not work. Also what about Post #2 ?