Quite a few guys in the Impala SS world have taken the factory 17x8.5 to 17x10.5 to allow 315/35-17's to fit. I'm curious if anybody has looked at available space behind the factory 20x9 rear wheel for a 1.5" additional wheel width. 315/35-20 rear with 275/40-20 tires would be a great setup for these cars as oppossed to the skinny 245 and 255 setup.
Could anybody take some pictures of their Magnum SRT-8 frame to wheel clearance so I can start my planning...

I'm looking at my wife's annual bonus as a down payment and trading in the 04 SRT-4 for the Magnum SRT8 in early 06. I like to plan well in advance for mods and traction would be the first consideration for me.
Mike