If you are going to remove the heads I would recommend them. Mine didn't seem that bad when I built my motor. However, they no longer hold the lifters up on there own during a cam swap.
im gonna order them its like 8 bucks its worth it to me
The LS2 trays are same as what comes in the truck engines.
The Fleet...
2003 Suburban- 5.4 L59 331CI 10:5.1 Compression -Built by ME
2004 Avalanche- 5.7 LS1 -NOT built by me
2005 Silverado RCSB- 5.7 LS6 -Built by ME