Disappointing dyno results

Jim Kueneman said

You talking about my curve? That model was run with the parasitics that a later engine would have been tested to like waterpump, etc so it is a hybrid curve... early specs but running the test more like they had to in the later years (along with the lower performance specs of the early 70's). It is 10.5:1, 2.02 valves with measured flow data.

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Ok, I misunderstood. You are running through software? a Dyno model that projects end results? What I was saying is the later 340 style internals would produce less HP than the early engine with 2.02s high compression pistons X heads etc. Nicks garage on YT dynoed an early 340 that was basically stock internally save for carb and headers, I believe had had a 345 HP pull on his dyno with tuning.