electric fan options to supplement mechanical fan

[vortec]

the fan shroud (in my 82 with a 350) is really stubby and doesn't appear to afford much room between fan and rad. to keep temps down during low-speed rock crawling, etc., i was considering an electric puller (more efficient than pusher) between the mechanical fan and radiator, and making it switchable. i know i wouldn't be the first. does it break up the airflow too much when just the mech is running? how many cfms would i need (2000+?). what junkyard vehicles might make good donors? thanks in advance

 

[Brodie]

The late 80s earlt 90s F*rd Taurus fan is you best bet. It is a two speed fan that I think puts out about 2500 CFM. Plus if I remember right it will almost bolt in. As I recall the fan was only about 30$ at the local pick a part.

 

[MNorby]

I got my ford windstar fans for $18 at the junk yard. Fit radiator nice just gotta build brackets