It's up there as one of my own Top Five favourites too, Bill -- if you like it so much why haven't you already started it
Next installment ...
WW2 ends early, B-29 not developed. Post-war isolationism, austerity and the only wars are those in British-controlled colonial Africa & the Mid-East. This means that the B-17 remains the USA's main bomber till 1975. No A-Bomb or Cold-War so jet-bombers are not needed as prop-jobs are better for small, low-intensity conflicts .....
Threats in 1968 to the West's oil supplies by more Mid-East unrest has American bombers sent as part of a League of Nations force .....