CHE has been doing this with bushings for 5 years, so it's not a new thing for LS engines. I ran bushings in my shaft rocker SBC dry sump race engines 15 years ago. The technology is sound, so don't shy away from it...however...this is really only necessary for "all out race applications" or a build where the owner is always up around 6k to 7k rpm, with a valve train that is brutal. The typical aftermarket bearing trunnion upgrades are fine for the average street car that sees an occasional blast. I did my trunnion upgrade, with bearings, at 80k miles, and my shafts were perfect, with no wear.
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