Depending on the size of the socket you may be able to tighten the head bolts without pulling the cams, you'll just need to turn them periodically to let the socket clear. I've done it a couple times.
When you torque the head bolts down remember to do it in multiple passes and also make sure to loosen any head bolts which are not already loose by backing them off 1/4 to 1/2 turn.
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