A lot of that last paragraph is that they had a box to work within.
Engineers chose a path. How do you think a 340 built to HP would have run with a cam similar to a 30/30 chevy solid. A 440 with a LS6 style solid? Would have been an entire different crying game from the bowtie crew. Being that the cams mopar chose were small in comparison, the LSA makes little difference.