It's a 360, they all have vacuum advance, not an old engine, it replaced the 340. I'm going by what he said, and that was it's pinging, so he is probably getting way past the 34 with the vacuum advance, so he needs to be all in with the vacuum advance hooked up. He also probably has it hooked up to the wrong vacuum port, or wrong gasket on the carb. He could have also put to light of springs for the centrifugal weights and the come on way to quick. He could also stick a Allen wrench into the snorkel of the vacuum advance and have it come on later. Many possibilities.
