I don't think number 2 is the oil cooler bracket, plus 1 and 3 look like they are the bellypan brackets, but number 1 has an added bracket for an aftermarket bellypan.
doesn't look like number 2 in the picture. I reckon it could be another piece of an aftermarket bellypan bracket.
![Image](http://i1143.photobucket.com/albums/n629/bigspanishmarty/0_0.png)