They have definitely sagged, Peter - which is normal for a car of this age. Distance between removable cover board and axle housing on my about 20 years old springs is 80 mm (I don't give you inches as I learned that you despise old techniques :-)).
@Graham
Why losing weight when you can change to springs with 5 blades from the Fourseater??? Don't help ruin the pasta industry!!
Cheers
Frank