- 17" wheel/tires
- front disc brakes
- front sway bar
This would be considered a "starter" pro-touring car.
Next items to bring it up a level:
- rear sway bar
- rear disc brakes
- OD trans.
- rast ratio steering box
- Rack and pinion front suspension
- lightweight engine components (al. heads, intake, master cylinder)
Convenience items are nice and bring it up to modern cars, but not sure if they necessarily make it more "pro-touring":
- tilt wheel
- modern seats
- full gauges
Yes, the XV level 2 cars are what you call the pinnacle of pro-touring: