318 1/8 time improvement

The fact that its a " build " tells me a lot of thought went in to it and there's more to the story. Its not some 60,000 mile half worn out 318 like mine was. Yes 12.50s is fast but imagine how much quicker it would be with gears and a converter , say a 10 inch converter and 3.91s and still be street able.
I understand what you're saying but its not anything exotic nor am I trying to take away what you've managed to accomplish which is impressive to say the least. If you saw the car you would agree it was a nice restoration and look over the engine and say to yourself this will only run 14's because its stock except for an Airgap, Holley carb and an MSD ignition. All else it was stock down to the steel wheels and 225 street tyres.

What is interesting is the acceleration rate with a 2500 stall and 3.23 gears. This thing has to be making a LOT of torque to be able to run those numbers with those 2 limitations. The cylinder fill has to be extremely efficient across the entire rev range to achieve that.