I called several dealers in the area today to see about getting a hydraulic kit (its my understanding that it's all one sealed unit-master cylinder, slave cylinder and res.) for the T56 I am getting ready to install and came across a problem.
Apparently there are two different types. SERIES I & SERIES II..... Gm part numbers respectivly are: 12557509 & 12559912. Everytime I called a dealer the question was asked: "Which series do you have? There should be a tag on the lines with a number" and I followed with "well, can you tell me the difference between the two?" followed by a "nope". Supposedly the part numbers for the clutch, pressure plate, and throwout bearing are all the same for at least a 94, 95 , and 96 Camaro and Firebird.

Does anyone have any clue as to what the difference is between these two part numbers? Size of master cylinder? slave cylinder?.......I really am not interested in messing up the clutch or something by not having the right part.

TIA