Im going through something similar, but I have 26 1/2 in the rear and the same in the front but the car looks like its to high in front for some reason? so i filled up my gas tank and loaded 2, 5 gallon pails of paint in the trunk to see if I could get the front end to drop a 1/2inch, it did and it looked perfect, so now im going to lower the front end to 26" by adjusting the torsion bars in the front end, check out this link:
Pelican Technical Article: Lowering the 911 - 911 (1965-89) - 930 Turbo (1975-89)