Torq-Thrust II 17x9.5 ?

[Mighty Mouse]

Here's what I've got. 86 GT stock height and 5lug conversion. I've also put a Maximum Motorsport torque arm kit under the rear illeminating the need for the kicker shocks.(kicker brackets have also been removed) The kit I used also utilizes the adjustable lower arms.
I'm trying to find out if the American Racing Torq-Thrust II wheels 17x9.5 with a 6 3/8" backspacing will fit into my rear wheelwells with the extra space Iv'e made with the MM Torque arm kit. I would also like to use a 275x40x17" tire. Will there be a major clearance issue, or just some minor fender lip rolling?
I've already talked to an American Racing rep and didn't get any solid answers. So before I unload that much cash on some wheels and tires I'd like to hear some feedback, thanks in advance.

[telco]

As far as diameter your cool. 275's should fit with a little bit of wheel well work. There's a hump inside the wheel well you might have to beat down along with the lip roll. As far as backspacing goes You are 2 5/8 inches outboard of center which may be too much. My reference book says that with those tires and a 10" wide rim (important to limit sidewall flex) you need 5 3/4 backspacing AND a Panhard bar with drum brakes. I'm not familiar with your torque arm kit so the Panhard bar may not be needed if the torque arm prevents lateral axle movement.

[Mighty Mouse]

The torque arm replaces the two upper control arms and also utilizes a panard bar. This setup has completely elimanated all wheel hop and odd rear end movement when cornering especialy when applying power as you exit the corners. I currently have 15x8 welds with a 5.5" backspace and a 255x60 series tire. since I've already removed the torque strut hardware, it looks like I could fit more wheel and tire but without a lift its hard to take measurements while compressing the suspension. Has anyone else done this on an early Fox Chassis? Thanks