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I'm hazy on valve train geometry and trying to make sense of it but I'm thinking on hyd that if the preload is right (however many thou) that all is good. I would go to the Hughes site and read their info. They want the right length p rod so at a certain % of gross lift (40% if SB & 50% if BB or vice versa) that the pushrod and the rocker arm should form a T when viewed from the front (which means each cam would need diff p rods) and then the wipe pattern needs to be checked/changed if needed.

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