Sorry for the delay but been a little busy...
There are plenty of people in my country that are into muscle cars, however these are actually few models produced here by GM, Ford, Chrysler, and also a company no longer in business that built the AMC Rambler under license (down here known as Torino, not to be confused with the american Ford), and none where as powerful or exotic as the american versions. Some of them where built right until 1990 (Ford Falcon). Sadly all of them where only available with 6 cyl engines although some quite potent (only the GTX from Dodge, built on the Valiant platform had an optional 318 V8 for it's 2 door version, and the Fairlane from Ford the Y block 292, however this model was only available with 4 doors).
We have some american cars also but these are scarce when compared to the rest (and usually quite expensive). For the most part these are Impalas and some Camaros and Mustangs.
A cool fact is that the 68-72 Nova was built here with no body changes whatsoever from 1969 until 1978, first only the 2 door sedan, and then the 4 door starting around 74 or 75. These where called simply "Coupe Chevy SS", and "Chevy" for the 4 door version, as "Nova" means "doesn't go" (no va) in spanish... Only available engine for the coupe was the 250 six. We had a special version called "Serie 2" with more cam, compression, and revised induction that put out 174 HP.
All the "Argentine" models are extremely popular even today, and some have been converted to V8 as well.
These are pics of my car, as you can see it's quite dusty as the road leading to my house is gravel... Also the engine before I tore it down a few days ago, and the 9" rear install finished about a month ago... Hope to have it running after the winter!