[blykins]

I don't back them off and retorque. I just go over each one in sequence at the torque spec and check them.

As for running the valves, you don't need any special tools. A closed end wrench and an allen wrench or T-handle works just fine.

Set the intake valve when the exhaust valve on that cylinder is starting to open.

Set the exhaust valve when the intake valve on that cylinder is starting to close.

Your cam will have a hot lash spec. Subtract about .006" from that to set them cold, then go over them again as a double check when the engine is hot.