Car sighting

I know next to nothing about cars, but I've seen a cool car parked in a driveway recently and it's been bugging me. I've looked around, and it looked a little bit like a Shelby (like the one at http://www.cars-on-line.com/18300/66shelby18404-A.JPG), but... smoother, I guess. I can't really describe it, sorry. It also kind of looked like this car: http://collector-car-classifieds.com/images/1968-Pontiac-GTO-1.jpg
It's most defining characteristic was the vents in front of the rear wheels; they were just flat on the surface of the car, not like the shelby's, and they were angled (think >>>) and looked a lot like gills. There were three or four, I think. I couldn't see the front of the car, so I can't describe the headlights or anything. It was also stripped down to bare metal. I've been looking at a lot of car websites but nothing's quite right, and I'm beginning to think it must be a custom modification or something. Can anyone help me? I'm very curious, and this has been bothering me.

http://musclecars68.tripod.com/1971_HemiCuda.jpg


look there.. is that the mystery car? the only mix between a GTO and a GT500 i could think of was this PLYMOUTH HEMI CUDA.. look up different years if you think this might be the one, just a diff year

Oh man, I think that's it. The car I've seen is a coupe, though, but it looks like there's a coupe version of the hemi cuda. Kind of sad to see it rusting away in someone's alley, though... Anyway, thank you so much! I see this car nearly every day, and it's been bugging me forever.