I have a a 392 stroker in my car and have not been able to keep the motor cool while street driving since it was installed. It has a Champion 4 core "Monster" radiator, New Thermostat, and basically new factory style water pump. It's a drag car, so it currently has water in the radiator with a Water Wetter style additive, I know this should probably be changed out for coolant for street driving. The shock towers are shaved for some extra clearance, but I think the engine bay is still a little tight so I removed the hood and did some short-ish drives to test. The car does really good for about 20 minutes of either highway or surface street driving and never gets above 190*. After those 20 minutes though it starts to creep up then runs away regardless of traffic or surface/highway driving. I'm also fairly confident it could use a fan upgrade since the current electrical fan is only rated for 1100CFM. However I've always been of the understanding that at highway speed a fan is irrelevant due to the speed of air coming through the radiator. I know there are a lot of things that could be improved to help here, but I was looking for second opinions, and if anyone could think of why it can drive so nicely for so long then run away like it does.