I tell you one thing the car looks sicker more I will post pictures for others to see yes the tire fit on with no prob.

 

That wire is whide for that rim, but it will work, although not prefered... you're buldging the tire pretty good by mounting it on a rim that's 1.5" narrower than it's designed for.

I run my 275's at 18 psi on the street and get a all right wear pattern, the centers wear out faster than the edges no matter what. It's just a side effect of such a soft tire. I typically drop them to 12-14 psi on the track, depending on weather conditions and track prep. These DEFENETLY require a decent burnout to get them gooey, but once they are warm, they stick VERY nicely...

 

Running 315 DRs on a 9.5" wheel has been debated many, many times on this board. Basically, the 315 is too wide for a 9.5" wheel, and although you can run it on one, you won't get the full benefit (full contact patch). While I don't have any hard figures on it, I would bet that the contact patch from 275/40 on a 9.5" wheel would actually be LARGER than a 315/35 on a 9.5" wheel. As for pressure, can't help you with a 31/5 on a 9.5" as I've only run them on 11" width. On an 11" wheel I run 28psi on the street and the tire wears perfectly. For roadcourse use, I bump that up to about 33-34, and for dragstrip use I drop it down to 20. Also, for a good launch at the dragstrip, you really need to heat the tires up with a good burnout.