How wide do you need? 9.5 in rim can accept 275 series and 295 series tire: depending on tire. I am relocating my leafs 1in, and wanted to try to stuff a 295 tire in the rear, and keep the fronts at 255. I see some people get 275 in front, but I wonder if that is too wide for steering feel. I know there can be issues with rubs at that size too. Wouldnt these TSWs seem to fit the bill just right?
I've got 17x9's in the front with a 5" backspace and 275/40/17's. My driver's side had no issues with a fairly standard modern alignment -.7 degrees camber, +5 caster, and about 1/16" toe in. Passenger side would rub occasionally going in and out of parking lots, ie, suspension travel with the wheel turned. I went up to -.9 degrees camber, no rubs. Steering feel is just fine, in fact, with my original power steering the steering feel with the 275's is BETTER than the old 235's. These things are way overboosted for power steering. The extra caster helps with the steering feel too, you wouldn't want to run that much with manual steering.
With an 18" rim you can run more backspace though. With a 17" rim you can't run more than about 5.25" of backspace because of the outer tie rod end clearance on the rim. I don't think I could even run 5.25" of backspace with my 17x9's, I really only have about a 1/4" of clearance on the tie rod.
But with an 18" rim the tie rod end is inside the lip of the rim, so you're only limit on backspace is the tire hitting the frame. With my 275's I'm not sure you could run 6" of backspace without rubbing the frame, but you could definitely run more than 5". I think ideally to fit a 275 up front you need 5.25" of backspace on an E-body. That would keep you clear of the fenders and the frame.
How about these?
http://www.americanmuscle.com/black-amr-18x9-0513.htmlhttp://www.americanmuscle.com/charcoal-amr-18x10-0513.htmlThey come in 18x9 and 18x10. The front 18x9's have a 6.18" backspace, so with a 1" spacer they'd sit at 5.18" which should be pretty close to perfect for a 275/35/18. Rears are at 7.4" backspace, so I think you'd need a spacer out back too.
The 18x9.5" TSW's only have 6" of backspace, so that's only 5" with the spacer you'd need. Might be too tight on the fenders in the front.