I use a Griffin radiator w/ 2 rows of 1.25" tubes. They wanted me to run the one w/ 1.5" tubes, but I couldn't fit it w/ my fan setup.
I have the fan/shroud setup off of a 2003 dodge Viper and it works great. If you want, I can get you the part number for it...it's not expensive at all if you know someone at a dodge dealer that can get it for you at their discount.

Or you can get in touch w/ sixpackgut here on the board...he has some cheap ebay fan setup that works great...he ran and won drag week last year w/ it.

The other thing is your pump...I run the 45 GPM Meziere pump that bolts into the stock housing.
This setup keeps my 850 hp Hemi cool on the street.