Scott, because our cars were designed 'way back when, the front suspension has what's know as a positive camber curve. When the car leans in a corner, the outside wheel ends up leaning even farther out at the top. This results in the outside edge of the tire trying to keep the car on the road instead of the whole tread face. By keeping the car from leaning, more of the tire is in contact with the road which helps traction, even if the spring rate is much higher than would be recommended for a more modern suspension design (with a negative camber curve). Your 700 lb springs helped in that way. Of course, the ride suffers! By using a big sway bar to keep the car flat and using "normal" springs you get a good ride and handling at the same time. A better suspension design would use lighter springs and sway bars.

I think Vikki bought a sway bar on Ebay recently for a reasonable price. I'll bet she did her research beforehand and knows some sources and prices. I have Addco bars on my '69, 1 inch front and 3/4" rear along with 300 lb front springs. It handles and rides quite well! Don't forget the other part, good shocks! Most have recommended KYB's which I like as well.