I'm just getting back into the street rods after 20 years and my brain is a bit foggy. This may be a simple question for all the gear heads out there, but please forgive my ignorance, I'm installing a new distrbutor in a freshly rebuilt350, I know that the timing mark needs to be on top dead center of the number one plug, is this when I set the distributor, or do I rotate the crank 180 to the number one plug and than set the distributor ? I know with all the vast knowledge out there one of you guys can take a minute after laughing at the question and refresh my memory.