Thanks- and yes the stock pilot bearing that came with the LS7 and the stock flywheel that came with it as well. I did some pretty careful measurements from the front mounting face of the tko to the center of the pilot on the main drive gear, then the center of the pilot bearing back to the mounting face of the bell. The two numbers show the pilot sitting right in the pilot bearing.
As far as the bell goes with regards to concentricity and quality, each one is checked on a fixture and there dead nuts on. Talk with grey, he will chew your ear for a bit, nice guy. I set mine up with a hydraulic bearing kit from CC, its the kind that floats(not bolted to the retainer)and you use some shims after doing a little math to set up the throw. I just hope its all good and reliable, probably the only area that I'm a bit fearful of. Sorry dont have any gm part numbers, Im away from home right now but have a gm performance parts catalog there. if your still looking in another week, ill get back to you. Do a search at Pace performance they have it all and very fair prices as well, or a search at
www.ls1tech.com/forums/ for part numbers.
Rich