Hello, I need help with a difficult harmonic balancer issue. I have a 1964 ford falcon futura. I have been told the engine is a 63 but still used in early 64. The car was built in jan. it has a 170 with one belt, no ac. I cannot find the bolt anywhere. I've tried and called all around the US and know one can tell me the size the harmonni balancer bolt is? I tried a 9/16-18x1.5 but it won't thread. And 1/2-18x 1.5 was too small. Any suggestions? Thanks in advance, Rob Sent from my iPhone