I have installed and been running the Mark VIII eletric fan and love it very much. The only problems you have to look out for clearance with an aluminum radiator. Since the fan covers ALMOST the whole radiator the shroud is very deep and you will have to trim it down to fit. I would swear by this fan as I have not had one problem over heating since the install(except when one of my hoses started leaking).
Here are a few links for the install
Link 1
Link 2