If you head over to the dent side section on FTW (ford-trucks.com) you will find some really good threads on Lincoln MarkIII fan swaps.
Or just use google and do a search for "lincoln markIII fan swap".
There is a multitude of different vehicle enthusiasts who use this fan motor in their rig of choice and all swear by it.
I picked one up from the junkyard but have yet to install. Once I do I will post more here about it and what I think.
I did however just finish doing the 3g swap into my truck and that I absolutely love. You can search that out as well on google or on FTE. In a nutshell it is taking a 130amp alt out of a new ford and swapping it into our old trucks. With all the electrical accessories I'm running on mine it was a must have. And the total bill? $78.32. That was the total from the junkyard and from the auto parts store getting the required fuse and some misc wire nuts.
I spent a little more but it wasnt required, just decided it was a good time to re wire lume my entire bay and secure everything down in a clean fashion.
Good luck which ever way you go.