The oil pressure for a stock 1968 Chevrolet 327 engine typically ranges from 20 to 60 psi when the engine is running at operating temperature. During idle, oil pressure may drop to around 10-15 psi, which is generally acceptable for this engine. It's important to ensure that the oil pressure stays within this range to maintain proper engine lubrication and performance. Always refer to the specific vehicle's manual for any variations or specific recommendations.
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