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That hold true for ANY engine. You have no idea what any engine looks like inside unless you tear it down. The vice thing about the LS, and especially the later models is they use good lifter and have very few problems. I have heard just as many problems with cheap link bar set-ups as I have with the factory trays. These engines have been around for years now, so if there was some major flaw in the tray design, it would have spread like wildfire, but there isn't. More problems arise from people installing stuff incorrectly or defective cheap parts than with the original lifters and tray design.
Take a bone stock LS3, throw in a decent cam, add a bushing kit to the rockers, change pushrods, and you are good for 575 horsepower with some tuning. Simple, easy, relatively cheap, and you have a killer street engine for 90% of the people out there.
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