440 power gains/ aluminum head advantages?

So went back and looked at my 4260# 69 Charger data. I previously detailed the specs I ran with this car (post #26). Again, TCI 10" Street Fighter torque converter that stalled (flashed off the footbrake) at 3200 rpm for my 440. Car ran 12.50's-12.60's and the 60' was right around 1.8 sec. Sometimes a tad lower, sometimes a tad higher. I used to joke that a loaded school bus gave me a good run to the 60' mark!!

Just a 60' number for your for reference.
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