Well, as someone with 30 years of dyno testing to call upon, I’m confident that if I built a 10.5:1 416 with TF heads, that cam, intake and headers....... it would easily exceed 550hp.

People like to quote the Moroso chart when it fits their narrative...... until you mention “Stock” or “Super Stock”....... then for some reason it doesn’t apply.

If we say the Moroso Chart is more accurate and reliable than a modern dyno, then I guess my friends 400 Pontiac, with its unported heads, .420 lift cam, stock intake and Q-jet makes around 545hp........ even if it makes nowhere near that on the dyno.

Just throw away the dyno...... a $10 Moroso slide rule is all you need for the most accurate power figures.