The ele. fan is a good thing for like rock climbing or hill climbing because of the prolonged slow moving or idling .
you will not see a gain in hp or mpg .
and if you do go with one and ever do any river/water crossing make sure you have a switch for cutting off the fan.
I have one in my 53 cj because i use it in parades , and have tried it on my 85 but found the stock fan cools better over all.
if you are having over heating problems , make sure the shroud is in place and the fan clutch is working good.
Do not use a flex fan.....stay with the stock steel fan.
and the additive called water wetter or rad cool really does make the motor run between 15-20 degree's cooler....Good Stuff... for the summer ( any auto parts store will have it )
give me a call if you have questions.