Not trying to start anything but I used to run small block Mopar and they it ran in the early 11's high 10's but I had a lot of money into it.
I built a 9.5/1 440 30 over with TRW flat tops, 452 cast iron heads with 2.14 1.81 and a bowl port and a 850 holley with a 727 and 430 gear and it ran 10.43 in the same car with very little tuning.
It only cost me around 2500.00 and some used parts I acquired at swap meets.
Its more a "the bang for the buck!"
I loved my 340 notchback, it was a monster on the street.
Its just cheaper to go fast with the Big Block.