Distributor

Going to make this pretty simple.

If the engine is well built so there is good mixture and heat in the chamber, then it will not take a lot of voltage to jump the gap and not alot of current will be needed for the kernal of flame to grow. Back in the 1960s when people were ignorant, this was done with flint and steel. OK. I"m being a wiseguy there. But seriously all these engines ran on the mighty power of points, and good part of the reason they do is in the chamber spark will initiate without some crazy high voltage and have enough energy left to keep it burning until the flame grows on its own.

When we stuff an engine up, or build it for a purpose that results in cold burns, poor mixtures, or are pushing the envelope, then some of these fancy things get that flame going better and have less misfires.
Not all of those things fit well with an LA engine in an A-body.
A lot of those things are junk even if in theory they are more consistent or 'powerful' than than points or factory ECU.
For example do a search for 'Skip White' distributor.