Bob,
I have a set of Sparco, Torino seats in my 72.
The seats do have tracks under them, but are bolted directly to the carpet without spacers under them. Makes it pretty tough to move them. These are great seats, ---- Butt ----, I'm 5'10" with pretty short legs, my floor pans are stock, not lowered, if you are taller than me, or have long legs, you wont be able to drive my car. If your taller than 5'4", you wont be able to sit in the passenger seat either. I have about 3/4" between the top of my head and the roof, haven't tried to get in with a helmet on, afaid I might not be able to get back out.
The drivers seat fit in pretty well, even was able to move it a little more centered on the steering wheel than the stock seat. The passenger seat, sets forward because of the firewall bump, (stock), and I had to remove the adjustment knob from the left (inner) side of the seat back to clear the em. brake lever surround.
I would like to convert to the notched firewall set up to give this seat more room, but since my wife fits just fine, I'm not really motivated to spend the money required to modify the car.
These are a touring style seat, and have some bolster at the seat and back, not as deep as some of Sparco's other style seats. Also, they are covered in a material Sparco calls "Alecantero"? not sure of the spelling, it looks like suede lether, charcoal gray and black, and is an expensive upgrade from the standard seat covering. So far, it looks great and wears well.
I'm real happy with how comfortable and how good the seats look, but for a taller driver, these would not be a good choice.
Hope this information helps you make a good choice.
Take care,
DT