The springs arrived today, and 45 minutes later I was on the road. As I'd hoped, it made a big difference and the car doesn't jump all over the road when I hit a bump, which was my main goal.

However, the car now bottoms out on bumps that it didn't before, but I started with the basic unloaded settings so my next move is to adjust the springs so that the shock travel and frame clearance are what they were before with me sitting in the car.