Ok. A couple numbers.
Your vehicle wieghs roughly 3500 lbs.
You have 400 cubic inches.
A rough calulation states that you would have to have around 650-700 horsepower to make just under 10 seconds.
You have high hopes for that motor, my friend. Best bet? I suppose that if you were to install all-forged internals, not bore it out (to save wall thickness) and run a large (and I do mean large) shot of nitrous, that you may be able to make that time. Once, maybe a couple times at best, that is.
My advice? If you have confidence in your mechanical skill, then clean up the motor, if it runs well then maintain it well, possibly look at a supercharger system for a little reliable bang, clean up the rest of the car and polish it real nice, and love your car for what it is, an asphalt ripper, not surfer. Enjoy classic cars for what they are, you have a beautiful vehicle if you take care of it and treat it well.