Italian-S, I worked on a '73 Pantera that came with Ferrari Boxer seats but not installed. Worst setup I've ever gotten snagged in. They are too wide- enough that I had to remove the stock seat belts, retractors and plates in the rockers and substitute 3" 'racing' belts which were already sort-of-installed. The setup obsoleted the stock shoulder harnesses but Hall over-the-shoulder harnesses were included. The attach bar did not fit & the special stock bolts were missing..... I made thin sheet metal covers for the rocker panels & used flat-head metric screws for clearance. The recliner knobs still interfered so they needed to be removed and a large bevel cut on each knob's periphery to clear stock rocker panel upholstery. The fore-&-aft adjusters were at floor-mat height so they needed careful S-bending to clear stock mats, and since F-cars do not use rollers in their adjustment rails but flat poly sliders, actually moving the seats back & forth was still a two-person effort with someone in a seat.
If I'd had ANY other seats available, I would have gladly used them & junked these F-car seats. About the only good thing was, they were high quality leather.... Maybe Daytona seats are narrower & would work better but I would NOT recommend early Ferrari seats like this car had under any circumstances, unless you plan on a pro totally reupholstering the car. Measure VERY carefully- Pantera cabins are narrow!