Chevy 350 flat tappet cam1/26/2024 ![]() Now make your decision and let us know how things work out. Also if you did a valve job and increased your spring tension at all, now you have sped up that process. Use a straight edge on the bottom of the lifters and if you have any at all cupping on the bottom and it don't go back on the matting lobe You are Screwed. When you miss match them the lifter contact can stop the lifter from turning thus causing them to become a Grinder to each other. As they ware together the dome slightly goes away and the square shoulders go away but the lifter still keeps turning. The lifter bottom design is to rotate the lifter as it goes up and down. The new lifters are Not flat on the bottom, they are in fact domed to the center. A new Cam has lobes that start out machined square on the sides. Sounds like you don't clearly understand the Cam and Lifter relationship. ![]()
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