Took a couple pics to show you clearance. Heaps of room. I am using a 14" steering wheel though.
The side shot of the seat is from the carpet to the highest point which is the side bolster. The seat pad is much lower.
Once you take the rails off the falcon seats, you're left with 4 studs. The front studs can bolt directly to the original front holes on the seat rails(with the bracket sandwiched in between) as the width dimensions of the seat studs are a perfect match to fit into the seat pan. This will also move the seat back a couple of inches also(which is a good thing). The front to back dimensions are not a match, and that's why you need the bracket, which will interface the rear seat rail mount and the rear seat studs.
Once mounted you need to grind down the front studs so the rail can slide over them.