Motor Mounts And Hoosier Quicktimes

[Mustang_GT_90]

This is a two part question. First of all I've managed to destroy my drivers side motor mount spraying in low gears. I'm going to put a torque strap on it and replace the mounts but I want a tougher mount. What are you guys running and having luck with?
I looked at the poly mounts that they sale in summit for roughly $150(both the transmission and the motor mounts but that seems a bit high). I've also been told that I will be fine running a set of stock convertible mounts that they were tougher but I'm about to start running it on slicks and would like to beef it up.

Next is about the actual slicks, I'm wanting something I can get away with legally on the street that way when a cop pulls me over I can say they're legal. I looked at the BFG drag radials and I've looked at the Nittos and Hoosiers. I wanted the BFGs but I don't like the sizes and then I looked at the Hoosier Quicktimes. They are legal and I've seen cars yank the wheels on them but what size can you fit under a stock 87-93 tirewell. I've got an extra set of 8 inch welds I just bought for them will a 245/60D15 fit on the backend without rubbing. The quad shocks are in place. I'm getting away with 275 series cooper cobras right now so I think they'll fit.
Here are the specs on them:
Size: 245/60D-15
Rim: 6-8''
Tread: 8.0''
Section: 9.8''
Diameter: 26.1''
Anybody running anything like this and how do they hook? I just got my driveshaft saftey loop on and am about to order a set. Sorry to be so long in this post but I was trying to cover all questions in advance.
Thanks for any input