Reply to "Roll Cage"

Hockeydude, whether a roll cage in your car will fit depends on your physical build. If for instance you're over 6 ft, then you likely will have head issues with the Hall bar (maybe your passenger, too). But if you're of more modest build, you could make it work.

First, Halls bar does not lay tightly against the inside of the roof- there is some wiggle-room that a good installer could use to advantage. Getting the headliner & trim in afterwards might be a job for a pro upholsterer.
Second, the driver's seat can be relocated sideways an inch or so right up against the console- possibly more if you use a custom seat or have a stock early (2-piece) seat reworked. I had our driver's seat modified by bending the seat's rear crossmember for more tailbone room, then repadded and reupholstered. I remember a midwest club-racer that managed to move his custom Sparco seat more than 1-1/2" toward the center of his Pantera with little trouble. He did it for a better driving position, but the effect still counts.