Best possible mileage?

I think I saw fan shrouds for sale on this forum that were said to fit these early As.

And I've read about people monitoring their AFR to properly tune their cars. Is that really necessary for a street driver that isn't running on the edge of the performance envelope?

Before doing the best cruise timing adjustment for optimum mileage, I mapped out my mechanical and vacuum advance. It doesn't even come close to what they are talking about in this article; Everything you wanted to know about ignition advance | For A Bodies Only Mopar Forum

My Vacuum advance is all in @ 21 degrees at 9.0" of vacuum. And my mechanical reads 2.5 deg @ 1,100 and all in with 16 deg @ 2,500. The receipts that came with the car show a remanufactured distributor was bolted on in 2008, and 5K miles ago.

The good news is we can still drive her about while I tinker on it! :steering: