[MARKDTN]

I don't know which study the OP is referring to, but most of the fan studies conclude that an electric fan is less of a HP drain. Yes you would need a bigger alternator, but I would do a bigger internal regulated alternator (like a 78A 12SI AC-DELCO #321-247) and a single 1-speed electric fan from like a Cavalier or Cutlass Cierra. I have no use for aftermarket electric fans, but the OEM ones are very reliable and work well-and parts are availble anywhere. A nice single speed OEM electric fan would give you faster warmups in Winter and less HP draw while cruising down the highway. And less weight on the water pump.