Big Block radiators for our trucks?

[gofastnut]

OK, so right now I've got the strait six and the cooling system is barely adequate. I'm S-L-O-W-L-Y building a roughly 500hp Big Block to put in it.
What kind of radiators are you guys with Big Blocks running?
I know the hole in the rad support is 25", I'm planning on moving the battery, can I go with a bigger(than 26" wide) rad?
Info would be great, with pics would be even better.
And I'm wanting to get it done befor the Cruise nite in Colusa on the 12.

Thanks guys