1️⃣American muscle cars in the 1970s witnessed a decline in performance and design.
2️⃣Mercury's Montego GT, produced in 1972, is one of the worst muscle cars with underwhelming specifications.
3️⃣The Mercury Cougar in 1972 became slower and departed from its original sporty design.
4️⃣The AMC cars, including the Javelin AMX and Rambler Marlin, lost their appeal in the 1970s.
5️⃣The 1976 Ford Mustang II had a significant decline in design and performance, causing a tarnish in its reputation.