It looks like I am going to have the spring seats machined, on the exhaust side only so I can get the PAC 1243 springs installed at 1.850. Because the intake valves are .060 longer than the exhaust valves it is creating a challenge. IH height on the exhaust valves are from 1.826 to 1.840 and the intakes are 1.885 to 1.898. I'll take .030 of the exhaust spring seats and that should do it.
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Tim Corcoran
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