Go Electric?

The simple math....You have A/C. Get the maximum air flow you can afford. A single electric IMO will not be enough to keep things nice and cool on hot days and idling. (+95° type stuff) Some really nice units can be had at your local junk yard tho. Dual fans from a Caravan, or some GM products arent really expensive, and will work just fine. Some even have their own built in shroud. Just make sure to run a good enough relay, and use big enough wire size, and they'll be fine.