What years are you thinking about? As the real muscle cars started in about 1968?
Ford Mustang started in 1964 with a straight 6 engine(not muscle car) When the Mustang got the 351V8(big block) or larger engine like 429cu.in.(about 1968), this is more of the muscle car competing with Camaro,Pontiac Firebird,(both holding 350 engines or 396 or 427cu.in.), Plymouth Barracuda or Hemi Cuda 426 cu.in.with positrac rear end and 4 speed Standard transmission. Or Dodge Charger or Challenger with 383 cu.in engine.
they were cars that made noise like at drag races on the main streets running lightly muffled exhaust headers, with dual carbs and a hood scoop...and as wide a tire as legally allowed on a street vehicle. They had about a 8 year run and then the "antipollution and anti noise laws would DING them. The cars were good for straight line racing. Terrible fuel economy like 5 MPG when you used it as a daily driver. Gas prices also shot up to 5x's above when they first started making the cars.
. After 1975, the DOMESTIC muscle cars died out. Too many regulations were enforced.
. For awhile all the cars looked dissimilar so you could tell what it was as it drove by. Now they look basically all the same.
. No one is twisting your arm to buy one. The Mustang II is not the Shelby Mustang or the regular Mustang that could hold the big V8 motors.
. Ford just retained the name Mustang, instead of letting that car name DIE.
Ford is selling the name..."Oh, my dad had a Mustang" to the younger generation, so they are CONNED into buying a Mustang or a FORD product.
. Same name retention was done for the Camaro(though the newer Camaro is not the old Muscle car) with same thinking...the kids will buy because of the Camaro legendary name. It is not the same car. Not even "half the car" of the original steel.
. They were not made with creature comforts. Bare bones. It was a "THING" for a time.
The "kids" grew up and got married and had a family so the TOY had to go...is the usual story.
Besides it is not like the DRIVER'S HAD A CHOICE as to what the manufacturer's made. The manufacturer's designers came out with these styles.
Buy it or buy a VW Beetle or Mercedes Benz diesel and shut the heck up.
I wanna spend my money on performance part upgrades and New tires that have tread. Lots of tires.