The 383 is LESS prestigious than the 440. But, they are more plentiful and if you build it, for example, to the specs of the Road Runner engine, you would have one heck of an engine with loads of torque and horsepower. The 383 was discontinued after the '71 model year but thousands of them are still around and awaiting to be "reborn".

I believe the K member is the same for 318 and 383. If not, please correct me. And if K member is the same, the mounts will be the same as 318.