The S&W cage fits well. They like everyone else thinks it's just another Mustang, so to make it work the best some modification of the rear bars is needed. If you want swing outs, theirs suck. I used Alstons swing outs, but they cost as much as the S&W kit. If you get Chrome Moly tubes it needs to be tig welded. That is an extra cost unless you have the tools and skill. Painting the completed cage is the biggest PITA. Then you will also need a 5 point harness to be legal at the track. The cage does really stiffen the car though. It is one of the best mods I've done. But it was expensive and a PITA. It also at least in my mind caused the car to cross the line to more race car than street car. But I had no choice as the tracks would not let me run anymore till I had a roll bar.
Mike.........