I know it has been discussed before. I just installed the LS7 clutch, flywheel, and throw out bearing along with Mike Yeager's remote bleeder. The bleeder is a must, it reduced the bleeding time to 5 minutes.
I was having many shifting issues to the point where it was zero fun to drive anymore. Mine was never raced or beat on. The very heavy dual mass flywheel we took out was coming apart and had up to 1/4" inch of bad slop.
The new set-up took care of all of the shifting problems. I wish I would have done it at 100k miles rather than 146k miles. Drove it 1900 miles last week, and love the set-up. Just my .02 worth.