One more thing while I'm thinking about it. A solid roller requires high spring pressures to operate properly. The cam is dependent on windage slinging oil up on the camshaft lobes for lubrication. Your idle speed should be at 1000 rpm or higher for proper lube. When the car is started cold, I'm sure it doesn't like to idle. You should keep the rpm up to lube the camshaft right away.
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Todd
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