My high beams do not work. I have replaced my dimmer switch and both of my headlights. Any ideas?

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1972 Chevelle 454
Chevelle Pictures (http://community.webshots.com/album/55203245YfTpQz)
Engine Pictures (http://community.webshots.com/album/58398749FWYFLE)

Is the high beam indicator on the dash lighting up when you switch to high beams? If so, the switch is most likely working.
Try measuring the left bulb light green wire to ground when you turn on the high beams. You should see 12 volts to ground. You can get at the socket from under the hood without pulling the lamp. Without any other information, a guess is that the left socket crimp connection is bad.