We are getting ready to start the engine for the first time since the resto but have come up on a problem with the ignition. When we try to start the engine by turning the key the starter makes a fast clicking sound but the engine dosent turn over at all. Now when we take a set of jumper cables and jump the starter (black on any engine bolt an red on both main and purple wire terminals) it turns over no problem. The wiring harness has a good ground inside under the dash, from birdcage to frame and engine to harness but all we get are clicks from the starter. What do you guys think?