PICKING UP STEM HEIGHT
When working on GM cylinder heads like the LS series, that have a short tip length, you may need to have the valve shortened for correct stem height. The valve tip may set below the retainer. I use my Sunnen cap grinder to remove .020 from top of retainer. This helps to reclaim some rocker to retainer clearance.

Jack Conklin
Performance Machine Specialty
Cleveland, MO
August, 2017