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17 Here, the valve lash is set on the valvetrain. The rocker arms are matched with 8.60-inch (intake) and 10.30-inch (exhaust) Trend pushrods that have a thick, 0.135-inch wall for greater stiffness. Per the oiling circuit of the standard 429/460 engines, the rocker arms and springs in this engine are oiled through the lifters and pushrods. The original Boss 429 had oil delivered via pedestals linked to oil galleries in the heads. The 460 block doesn’t have an oil gallery to support that system, so the Kaase heads are designed without them.