1972 Mercury Montego
Despite the more famous Cyclone and Cougar models, Mercury offered performance engine choices to the Montego line, which was smaller and lighter. If you wanted low key muscle car approach and an unassuming performance car, Montego, with a 390 or 429 V8 engine, was ideally suited. It didn’t have wild graphics like other era muscle cars or bright colors, but it was fast, and buyers even could get a station wagon body style (via Hemmings).
However, despite being from the golden era of muscle cars, Montego is not popular, and nobody will pay a good price for restored or even perfectly preserved examples.