I agree those splits are pretty nice for a 340....67-.73-.77-.69od. Very nice progression.
I am somewhat surprised tho that you're not complaining about the lack of starter gear, or the fuel mileage at 65=1900rpm,lol. I'm guessing if NA that you're running a fairly stout cam,and or some mean heads,lol. With just an 8.59 starter, I'd have to guess heads?