Electric Fan Options

[Catch_22]

I have had it on my list to add an electric fan for some time and remove the stock fan. Some people say it helps with horse power, others say it cools better. Whatever the reason I need a better way to cool things down.

I do not have a shroud right now. I know my cooling suffers from this detail.

After researching myself and being told by others to just zip tie an electric fan on it, I'm torn on the best option.

Will zip tie an electric fan on it work ok with this?
http://www.jegs.com/i/Proform/778/141-646/10002/-1
At 16" its going to get close to that 80% coverage. And its cheep.

Ford Taurus stock fans of "legend" are another option. Has a smaller fan but a built in shroud that gives it close to 80% coverage as well.

Another option I have contemplated was leaving the hand chopper blades of doom and putting in a shroud.

I have also seem people mod an electric fan into the shroud. This cost the most at near $200.

Considering the aftermarket temp gauge I have is correct I run about 160 (in +80F) and up to 180 (in +95F)
Hauling things will make it runaway and overheat. I had to cut it off when helping a friend move on a 101F day.

Cooling is key, but keeping in the $100 range is desired. Any opinions of what would be best? Thank you, as always for any input. You guys rock.