My friends 350 Pontiac stocker has gone 10.80@123, at 3380lbs with small valve heads that flow right at 200cfm, at the max allowable lift of .420”.
Running the stock intake and Q-Jet of course.
(The Moroso slide rule puts it right at 7lbs/hp.
So, 482.8hp for 3380lbs)
How well does that flow line up with what the various ET calculators say the motor has to make for horsepower to reach that performance level?
Oh, and the 400 combo, with the bigger valve 220cfm heads has gone 10.37@127.