You guys be talkin about me like i'm not here?! Lol, anyways, I definitely don't have Saleens. I'm running MM's coil-over kit with 17x8 cobra R's currently. I don't think you'll have any issues with 315's on the back, that's mostly an issue the foxbody guys have I believe. Don't quote me on that though, as I haven't tried it yet. I know on the front some guys run 8" springs so that the spring sits completely above the wheel/tire. The downside to that is you it'll probably ride a bit rougher. I don't think it's really an issue on our cars unless you go past 9" in the front. There's a guy on Corral running 9.5's with a 1/4 inch spacer... ReplicaR should also be able to tell you some good stuff, he's running 10-10.5" wheels in the front I think, granted, they stick out far. MM should be able to tell you also. I wouldn't worry about it for a normal 275/9" set up though... That's just my .02