Chevelle = boring.
Give me any 440 6-pack or hemi Mopar from 68-70.
Muscle cars were big when I was a kid. There were organized drag races on a local highway when I was real young. My dad always had a junker hot rod for those. As an early teen there were still a handful of old red necks sneaking races in on the same stretch, my dad, his brother, and a few others.
*We? had a lime green, 70 Charger R/T with a stock 440 mag that was fast but mainly just pretty. 14 second quarter mile car. Probably a $100k car now but he gave it to my older brother who totaled it within weeks. Dad had an ugly 68 Road Runner, also a 440 but not stock, that ran consistent mid-upper 12 second quarter miles on street tires. That thing ate Chevelles and any other slobby 454 cars for breakfast, including a 454 Gremlin that one of his friends built.
The toughest competition around here was from a 427 Cougar and a 327 Camaro (3-2 barrel carb setup) pumping out close to 400hp. Also my uncle had a 65 Satellite coupe with a fire breathing 383 that really needed slicks or it would've beaten all of them. He couldn't get it to hook up at all in street tires but it ran in the 11s at PIR.
If there was one non Mopar muscle car I'd be tempted by it would be a 427 Camaro or maybe a Buick Gran Sport (for the obscure cool factor). Or maybe a Shelby GT 500 with a 427. The 427 was the best muscle car motor created by both GM and Ford.