How rare? 67 SS Nova red/red, 327/4 spd, AC, 12 bolt

[WSSix]

I don't know Novas but my friend is getting a lot of interest in his 67 Nova even though he's not trying to sell it. This has him wondering what's so special about the car.

The car is a 1967 SS with the 275hp 327 and 4 speed drive train. Red body with red interior. AC car and it has a 12 bolt. I haven't decoded the car but I'm told it's correct with the numbers matching. The car has been freshly restored as well. So is there something special about this combination that makes people make serious offers on the car as soon as they simply hear about it? Is there anything else we should be looking at that might make it rare?

Thanks for the help