Electric fans are pretty easy to install. I picked up mine from Summit for about $70. It's a 16", PermaCool (I think). I chose the 16" instead of the 18" b/c it seemed to move more air by looking at the #s. I also picked up the thermostatic Painless wiring kit for around $50 and an on/off/on switch from RadioShack (wired: thermostatic trigger on/off/manuel on). It keeps my 502 cool (around 190 deg.) in stop and go traffic when its 95 deg + outside. I also have a big, two core Griffin aluminum radiator which helps a lot. I didn't notice any difference in temp switching from clutched fan to electric.
On mounting, I don't suggest using the cable/straps/ties through the radiator approach. Over time it will wear holes in the radiator. I ran some 1"x1/8" flat bar through my shroud and bolted the fan to that. I'll put some pictures in the project journal. There are also brackets that mount the fan to the top and bottom of the radiator but that was more $$.
Last edited by 70bird; 08-13-2004 at 10:09 AM.