@bruce dolin Bruce - Vintage Speedsters (VS) typically have an adjustable rear trailing arm. Check your car to see if it has this...
If it does, it's just a matter of;
1. No need to remove wheels for this process. Jack the rear of the car to lift the tires off the ground. Place jack stands for safety.
2. Adjust the allen-slot bolt to desired height. If your car is sagging, then turn that bolt to lift the upper tab (red arrow). Do this on each side.
3. Its a trial and error process, so after each adjustment you make, you need to put the car back on the ground and drive the car a few yards to settle the suspension.
4. Continue doing this until you get your desired ride height. Easy Peasy.
If you car does not have this feature, then Gordon's process is the proper sequence for you to follow.
Let us know how it turns out.