Electric fans for an RB A-Body?
The most important thing you need to look for when you go to buy one is the CFM of the fan, there are 9" fans out there that will put out more air than a 16" fan. Most of the common fans listed in Summit and Jegs are not very efficient, they have a low CFM and they seem to be good deals but they won't cool as good as a quality fan.
If you are looking for a pusher fan, you need to just spend the money for a good Spal, nobody makes a good pusher and the reversible ones are not very good.