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In any case, you should check the lifter pre-load. It's possible the stock length push rods won't work anyway and you'll have to have custom ones made...unless you're using adjustable rockers...



You are correct on telling him to check for proper preload and length but adjustable rockers also need to have the correct type and length pushrods. You don't want too many threads showing under the rocker to make up for pushrods that are too short.