Some notable differences between the standard 911 2.0l and the S trimmed cars:
Higher HP (160 vs 130) -- my car dynos at 148 hp at the wheels, and has the Weber 46
carbs the 911S had.
Larger anti-sway bars -- got 'em
aluminum dash -- strangely this car has a wooden dash
Wide rubber trim on bumpers -- got it
vented rotors -- got it
Other intersting notes:
My 911 has the deep dish 15x6 rims that the 1967 911R had. I've never seen them on another
car that wasn't a 911R or 911RS.
It is also a factory sunroof coupe, something that was very rare in those
days