My personal experience with 130# CompCam in my own vehicle, when I had the springs tested during a head rebuild, the springs had weakened to 115# at 1.80" when they should be 130ish. I couldn't quote the mileage but it was roughly a year of service time. Very disturbing so I never ran them again.

Using the LS6 springs has nothing to do with cheapening out, I trust the quality, and in my experiences I had none of the issues suggested on this forum.