[RonC]

The engine shouldn't require any special running instructions. Start it let it warm up for a few minutes and then run it around the block for a few miles and check the head nut torque. The head nuts will loosen up as you drive it for the first several miles as the head gasket compresses from the heat. Don't push the engine to much under load until the head nuts stop loosing torque so you don't blow the gasket. After they settle you are all set. I would run whatever oil the rebuilder recommends and change it after 500 miles. I like to first fill the engine with at least a quart of oil through the distributor hole in the engine head. The engine does not need to wear in to operate properly if it is machined correctly.