I haven't driven a stock 340 since 1969 so it's difficult for me to remember just how fast the '69 Dart really was. Today I began some searches for some stock 340 dyno tests. Here are two I hope that may shed some light on the 340 output.
#1
stock to modified
Note how #2 was built to stock specs before the dyno test.
#2
stock? 340 build
Any other stock 340 dyno tests out there we can look at?