11. Chevrolet Chevelle SS 454 LS6 – $1.2 million
The Chevy Chevelle was always a very popular muscle car, and its combination of affordable price, excellent design, and powerful engines was a hit with the buyers. For 1970, Chevrolet offered an expanded line of engines including the famous 454 V8 big blocks.
The regular version was called LS5, and it was very powerful, but there was an even stronger LS6 variant which was installed in just 3,700 cars. The LS-6 had almost racing compression of 11.25:1 and used a bigger carburetor and much stronger engine internals. It was rated at 450 HP but more than likely produced over 500 (via Auto Express).