That's what a 340 will do and allways did and was allways a typical kind of curve with a short stroke and a big-ish - cam. I don't see anything out of the way that makes me scratch my head saying WTF is going on there.
Mikes engine is really nice and shows how a 340 is known as a screamer of an engine on those high winding small blocks. A reputation they have allways had!
Love the graph Mike. They allways help out a lot. No crazy dips or wacko peaks, nice lines.