No, i don't know the "178" dimension, thats my only problem
Rest of i can measure and calculate from aluarm with caliper and hub. I just dont have any 944 rear rotor now. Yes, i found that 944 parking brake shoes fit also to many other porsche model.
According to this, they should fit 928, 993 etc.
http://www.9xx-parts.com/store/index...roduct_id=1481