I decided to go with an aluminum Griffin Radiator that I sourced from Summit Racing. They have a wide selections of sizes with different outlet locations. The only thing I wasn't happy with was the poor welds. The radiator looks like it was MIG welded and then run back over in areas with a TIG. A friend purchased a similar unit from Jeg's and the welds on his were of much higher quality, all TIG welded. For the price though I cant complain, the radiator was right around 200 bucks and has performed flawlessly.
Since the radiator is universal fit all the mounting tabs and accessories have to be made. I started off by cutting out mounts from some scrap .06" Aluminum. When the radiator goes in permanently I will slot the mounting holes and mount it with rubber bushings to allow for flex and expansion.
Next up was the fan shroud which was made from 0.065 aluminum sheet. I trimmed the shroud to mount a 14" fan and installed riv-nuts for mounting, this would be a great application for nut plates on Rev 2. I chose to use a Flexilite S-Blade fan. I have had issues with cheaper electric fans before but this one has proven to be a good value. SPAL fans are always a top choice for me if there is room in the budget!
Punch flairs were added along to the top for a little style (Thanks to my Buddy Zach for lending me the die! http://www.prismmotorcycleco.com/). I used a Jeg's radiator overflow bottle, I was happy with the quality and how nice the 'rail' style mount was. I have the unit plumbed to recirculate, but the tank came with a petcock valve to install as an overflow if desired.
I connected the radiator using aluminum tubing an silicone connectors. A hump connector prevents issues with the engine vibration and movement.