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8 Our pushrods are staying the same diameter but now instead of the two-piece design we are upgrading to Comps Magnum pushrods. These are an affordable 0.080-inch wall, heat-treated, chromemoly pushrod with precision formed, reinforced ends. We ordered a set that measured 7.800 for this engine. If you are setting up from scratch, you should invest in an adjustable checking pushrod (Comp has a many) to help you simplify the job of figuring out proper pushrod length. We just measured our old ones and got the matching size.