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Originally Posted by Barry_R
Every new car and million mile semi in the country has rollers in the lifters.
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The lobes on new car cams are almost round compared to a performance grind for an FE.Spring pressures are much,MUCH lighter in a new car engine also.Everything in the new car engine was designed as a package.The roller cam is being retro-fitted in our case-and it doesn't always work in every application.