Duster 340 not a muscle car...

Lol, and factory fit to factory fit the 340 would smoke it. Hell, I think my 318 would give a stock 350 a run for the money, if not beat it.

lol, back in 77 my stock 69 Barracuda 318/2v with headers would regularly embarrass Chevy 350/4v cars..
For me, any domestic V8 rear drive car with some power and good power/weight ratio falls under the designation.
God is great, beer is good and people are crazy...