Installed a Pertroinx II to in my 67 289 ran great last time I drove it. But now it has a nasty vibration and makes the radiator support shake like crazy when I rev the engine sitting still. I put the timing mark at TDC but the rotor is on the other side of the dist. compared to #1. Rotated the engine one time around to TDC and the rotor gets closer to#1 but is still off and points between 4 and 5. is this maybe the timing chain jumped on me? Any ideas guys.