We got the broken springs out. The springs DO unthread out of the forks. We shaved down a square rod and hammered it up inside the springs and it was able to grip the springs enough to allow them to unthread. After the new shocks and springs were in, we took it for a drive with close to 900 pounds of people in it and the cart drove great.
Here's a video of the spring coming out.
Unthreading Springs from Fork in 1984 Harley Davidson Golf Cart