Magnum in 70 Dart, can't keep it cool.

Here's the latest update...
I took off the electric fan and shroud and put on an 18" mech fan and clutch. No shroud yet, it's all custom in there so I'll have to fabricate one.
I took the same long drive uphill that has always resulted in 225* temps at the top and this time (with the A/C on) it barely got above 195*, and that's without a shroud.
It really moves some air! I had it running yesterday with the car cover still kinda draped over the car and the hood open, and when I raised the rpm's the air from the fan filled the front of the car cover like a parachute. I had the door open and my leg out the door and I could feel a strong wind coming from under the car. It really moves some air!
It doesn't like sitting still and the temp climbs quickly at a stop, but I'm attributing that to the lack of shroud, since it never got hot sitting still before. I'll fab a shroud and see what happens. But this is a tremendous difference with the mech fan and clutch.
Everyone that said mech fan and clutch... you were right!
Everyone that has a cooling problem with electric fans... try a mech fan (not a flex fan), it made a huge difference on mine.
I'll get a shroud on it and post the results, but after all of the stuff I've tried to get this car to run cooler, this is the only thing that produced any results, and it's a big improvement.
Thanks for all of the reponses, this forum is the greatest.