Is the 383 a better engine, or does the 440 just have more displacement?

forphorty said

According to this article by Andyf, there doesn't seem to be much difference in weight. Sonic Checking the Mopar Big Block | AR Engineering

Click to expand...

The difference is in the mass of the taller deck for the RB block. It's the equivalent of having a pair of torque plates bolted on top of the B block. I dont think anyone ever said the difference was in the cylinder wall thickness....