FYI, in case anybody gets this thread in a search.
The ACT 6 puck disk does NOT have any stamping on it to indicate which direction to place it. There is an "F" stamp on the hub, which according to a pretty rude person at ACT stands for the number of splines on the hub.
If you look closely, you'll see the rivets/studs holding the hub to the disk are a different thickness on each side(the hub also "sticks out" on the side with the "fat" studs). If you put it up to the flywheel with the alignment tool, you'll see that the "thin" studs have to be facing the flywheel for there to be enough clearance for the disk to rotate. The "fat" studs will hit the flywheel bolts, and you aren't going anywhere with that happening.
So in short - thin studs face the flywheel and check to make sure the disk can freely rotate before bolting up the pressure plate.
BTW - I had to slightly grind down the pilot bushing on the inside diameter and then use the transmission bolts to pull the transmission to the engine. The pilot bushing was slightly too small as it came from ACT. Go figure...