will this fit over the fc rad? http://www.mosaicmotorsports.com/mis...acturers_id=12

 

From a quick look I would assume it would be too wide. I'm running a 16" spal fan and it takes up most of the rad.

 

The core of the stock rad is 17" x 22", so that would technically fit.
I don't think the mounting tabs would line up with anything though and twin fans are more difficult to wire up properly.
Since that part is marketed for a swapped FD, I'm assuming it fits a stock FD rad and uses the GM ECU to trigger the fans sequentially.