I prefer the spark plug socket that is 3/8 drive that has the u-joint attached to it. pep boys has it.
You also need a 1", 2" and a 4" inch extensions for that drive. That way you can get the ratchet to the perfect spot so you can use it. With the 1, 2 and 4, you can get every inch up to 7. And I don't think longer than that will be necessary.
Scott