Last year I undertook the same exercise, replacing shocks with 4 new Bilsteins, all the rubbers, the 5 springs, sway bar rubbers and steering shock absorber.
Prior to doing this work my car was originally sitting lower at the back.
Front measurement from center of hub cap star to bottom of fender lip was: 36.5cm (14.4in) both sides.
Rear measurement from center of hub cap star to bottom of fender lip was: 34cm (13.4in) both sides.
I replaced the front rubbers with 27.5mm rubbers and the rear with 30mm rubbers.
The car now sits even all round at 35.5cm (14in) from center of hub cap star to bottom of fender lip all around.
It's like driving a different car; ride, handling, cornering etc. all much improved!
On removing the old springs it was obvious how much the old springs had compressed compared to the new ones.
The rubbers were trashed and split.
After doing the first front spring, which was a real pain and hassle to fit with the shock absorber still in place, I then found that by removing all the shocks prior to installing the new springs, made everything so much easier and painless. Especially when it came to the front in raising and lining up the lower wishbone back into place with the new spring.
Another tip is to use masking tape to attach the rubbers to the springs prior to installing.
Also used talcum powder on the rubbers to make it easier to swivel/twist the springs into their final position.
Best,
Mike