Too much power too quickly with 8 barrels !

[Luke427]

Hi folks,
I purchased an original Ford riser with the dual Holley carbs and got all this setup in the Cobra. I can handle it, however the car has become too scary for my wife to drive it, and I'd like to keep her alive.
I don't drive the car much because of health issues, however when I do, I love the kick in the butt when the eight barrels open! But it's true that it becomes very aggressive - the car feels like a race car, no longer a street car even with the fairly conservative cams. My other sport cars now feel like the most boring cars compared to the Cobra

Is there a trick to easily tranquilize the engine?
I was thinking of removing a rod to keep one of the two carbs closed, but this will obviously result into terrible carburation for the affected cylinders.
Something to trick spark advance easily, maybe?

Thanks,
Luke