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One thing to keep in mind is that torque is usually dictated by bolt size rather than application. For proper tightness , a bolt attains a certain amount of stretch that equals downward pressure. Gasket applications rely on crush so usually a firm hand tight is good enough as long as it is even. In other words with an intake or a pan gasket etc. your not worried about it falling off but holding it securely in place for gasket seal. Rods , mains and such rely on absolute lack of movement, so the higher torque values and increased bolt sizes.
We did a "hand tight" measurement once and I seem to remember that about 50 lbs was about all you could get with a standard beam 9/16 combo wrench.
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