Is this a trick question?
‘Cause Chevy didn’t make a 327 in ‘55, the 327 didn’t come out till ‘62. And it wasn’t offered in the Bel Air with a four-barrel carb till ‘64. However, in 1964, the correct ignition timing would be four degrees before top-dead-center. However, in 1964, the correct ignition timing would be four degrees before top-dead-center.