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Message: <blockquote data-quote="ZeroG84" data-source="post: 1458467" data-attributes="member: 24342"><p>Thank you for the reply. The heads I pulled from the junkyard and cleaned up they don't appear to have any machining work at all. I pulled them myself. The lifters are stock originals and the rockers prior and rods prior were stock as well. I didn't check length b/c all i have read before was they will work with stock lifters rods and rockers. That was my first mistake. The springs are 130 seat pressure and 385 open pressure. I checked the installed height and all appear to be within .05 cm of the 4.45 required (1.8 inches) with valves closed... The heads were not milled nor the spring seats or the head itself. The pistons are stock notched piston heads. I'm attaching pictures of the aftermath.</p></blockquote><p></p>