About a year ago I had a local tranny shop install a Fidanza aluminum flywheel, ACT extreme pres. plate, perf. street disc,bearing and bushing. It worked great until recently, but now when I drive to work(30miles) it's fine, but if it sits in the sun, or when I leave work, if I leave it run for 10 min. The pedal gets real stiff, doesn't grab till pedal is out, and when I drive it for 30 min. or more, it starts slipping. I figured out that when it starts slipping, if I adjust the pedal in toward mast. cyl. about 1/2" it works fine. But the next morning it has about 1 and3/4" play in the pedal. I just put the following parts on, but I still have same trouble: Nissan master cyl., Nissan slave cylinder, SPL stainless line, speedbleeders (2). I still have the dampener on. Should I bleed the slave 1st, or the dampener? What else would cause this? Any help would be greatly appreciated. THANK