So you used an '05 rad? I see you also did a front end swap (i think =P). Was the rad swap a "bolt on" procedure? I'm also looking to get a smaller radiator, but don't have the luxury of doing any custom work.Here's a pic of an 04 radiator: (GoodKat's photo)
And here's a pic of an 05+ compared to a 1st gen: (can't remember whose picture this is)
If you look at the upper mounting tabs, (they are same width on each) you can see that the 03-04 is a bit wider.
Here's a before & after on mine:
(more pics and info in this thread)