Then I have some words from a 60's auto manual. A sign that the engine is running too lean is that in addition to an uneven idle and a tendency to stall while idling, fuel consumption was TOO LOW! Ran just fine when not idling, though might not have quite as much power as it should. Yeah, not burning enough gas was a bad thing! The recommendation was to enrich the fuel mixture.
Remember though that valve seats weren't usually hardened back then and a lean mixture might easily burn a valve. Lead helped "high compression" 8:1 engines live compared to the pre-war 4:1 or 6:1 motors. Cast iron motors were also the norm, and while keeping heat in the chamber, dissipated heat very poorly from valve stems and pistons, particularly since they would have been backed up with unpressurised cooling systems.... and we wonder why 60,000 was a high mileage engine due for a rebuild back then...ahhh the good old days.
I remember The RoadWarrior..To understand who he was, you have to go back to another time..the world was powered by the black fuel & the desert sprouted great cities..Gone now, swept away..two mighty warrior tribes went to war & touched off a blaze which engulfed them all. Without fuel, they were nothing..thundering machines sputtered & stopped..Only those mobile enough to scavenge, brutal enough to pillage would survive. The gangs took over the highways, ready to wage war for a tank of juice