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I'm in the middle doing the swap myself. I just got done tearing them down. I ordered the comp cam version on flea bay for 129.00 shipped. Easy job if u have a vise. My Vette only has 55,000 miles on it and you would not believe how sloppy the oem bearing are. You have to do this is you do cam or supercharger. Wait until you take your rockers off. You will see how sloppy they are.
I did the swap out several years ago, just as cheap insurance. It's not a hard job to do, just a little tedious, but it does provide a sense of security.
I actually looked into the "bushings", that a company called CHE was doing, as it looked both bullet-proof and fool-proof, but it wasn't "budget-proof".....They wanted something like $500 for their work, plus the down time, until they got the upgraded rockers back to you.
If you don't know what I'm talking about, think about the new roller lifters that Isky is selling, They have bushings, instead of roller bearings, and CHE was doing something similar with the LS rocker arms.