I saw nothing in the weather data for Marks sheets that seemed out of line at all for that region of the country, at that time of year.

Correction factor seemed in line to me.

For your combo...... over 500”, good CR, heads that flow 350+, big intake, correctly sized headers, adequate lift and duration.........700hp...... it’s just not that hard to get there.

Like I said, if I had it here, I’d absolutely be expecting it to break 700.