Dr E, about 30 years ago, one of our U.S club racers found that a stock early driver's seat and its rails could be pushed about 2" further toward the console. The passenger seat is hopeless unless the entire e-brake system is redone like on the post-'80s cars, or a custom seat base is crafted around the e-brake lever weldment. After a time, he found an aftermarket driver's seat that was narrower and could go even further towards the console. He stopped there.
The steering wheel ass'y is held to the lower dash frame with a simple clamp so if really necessary, modifying the clamp could shift the wheel inboard on its existing u-joints. But then of course the speedo & tach would be offset outboard relative to the driver, perhaps in an unpleasant way for visibility while driving. A whole custom dash would be necessary to restore stock visibilty.
As far as the pedals, that would probably require a complete new pedal plate with everything on the plate offset inboard. Depending on what size your feet are, the front end of the welded console structure (which is structural) might need to be severely modified for gas pedal foot-clearance.
Or you could get more used to the stock position and avoid most of this effort. It certainly didn't hamper successful Pantera racers, back in the day. Good luck.