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

I was having heating issues as well and some crusty old mechanic and I were bullshiting and he told me to get a shrouded electric fan off a 80's Mercedes. Found one at a wrecking yard for 40 bucks and that sucker could propel the car forward it moved so much air! Solved all my problems. Most of the new fans suck. Just another option to explore.