318 MAX fuel economy builds?

Bewy said

Elec ign conversion should be on the list. At the top. It has two important benefits that aids mileage & performance:
[1] it does not start to retard the ign from day one like points do because it does not have a rubbing block that retards ign as it wears. Retarded ign hurts performance AND mileage.
[2] you can run a bigger plug gap, which exposes more of the A/F mixture to the ign source, which is the spark. The best/simplest/best bang for buck system is the GM HEI conversion with a an E core coil such as the MSD #8207 & run 0.060" plug gaps.

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In regards to your number one. Proper lubrication of the follower is very important. You can wear out a set of points and nothing flat if you don't lubricate them. As for the variance of the Gap from where if you set your points Gap to the high side as they wear in they will be right on the money. Of course there is your annual maintenance for winter tune-up whatever you want to call it when you replace the points. And a lot of people do not realize that you can set the point tension by how much you slide the spring under the nut where the wire hooks up. More Point spring tension less Point bounce. People got high mileage with points for 100 years so it's not necessary to go to electronic ignition to get good gas mileage.
Jmho