Per the FSM, the only options for the 123.153 were short/long springs. No changes were required for extra equipment. Pre-1982 there were more combinations.

The FSM says 23 mm is the stock pad height for the front spring. EPC says 4 "burls" = 23 mm. The rear pad is 14 mm and that's two "naps". (I don't make up the words, I just repeat what I see written: nub=nap=burl). This is for the "short" spring with the red end. The "long" spring with the blue end uses an 18 mm pad and a 9.5 mm pad (3 and 1 nub/front and rear, respectively.

I'll do a before/during/after pic series with the car in profile.

No one has the book answer on how to measure the height at the front axle?