340 improvements with dyno numbers
I haven't noticed this posted, but I certainly don't read everything here.
This link lists a reasonable step-by-step modification list for the 340 complete with dyno HP and torque numbers for each step. That the link was on the top of a google search about the 340 likely means it's commonly read. Just 'cuz it's new to me doesn't mean a whole lot. It may well be a, 'Yeah...everybody knows this already,' sort of thing.
It was of particular interest to me due to their choices of modification, more than one of them fitting very well into choices I've made for my 340.
1970 340 High Performance Mill Dyno - Mopar Muscle Magazine