The first car I bought I pulled out of a junk yard in 1979 for $200, A dark green 1963 AMC Rambler. Should have left it in the junkyard. It didn't matter how much money I threw at it to fix it up, it didn't last long.
LOL. I missed the muscle part and was focused on gas guzzler. Although, as a young teenage girl, I didn't know much and thought it was a cool guy's kind of car. The next one I had was a red '72 Camaro. Another piece of crap car but when it did run, it was a lot of fun to drive.
The closest I ever got to a "muscle car" was a 1968 Chevrolet El Camino. It had the second biggest 327 engine available (no Corvette heads), four-on-the-floor and posi-traction. It was pretty fast. It looked just like the one in the picture ... except mine wasn't a "SS".
Had a 1970 Charger 500...though with a 318, I really wouldn't call it a "gas guzzler". My 1970 Charger R/T with a 440 police motor and a 750 double-pumper Holley...yeah, that one qualifies.