So just how good was the A-Body back in its day?

I never payed much attention to the Darts, too many GTX, Roadrunners, Superbee, 'Cuda, Challengers, Demon, Duster, GTO, Firebird,
Chevelle, Camero, Mustang, Torinos with giant motors to mess with
small block mostly passenger cars.
Olds and Buick made monsters to.