I found an interesting mention on the lend-lease Wikipedia page that the Soviet Union requested a total of around 600 heavy bombers over the course of the lend-lease program. Now, ignoring the fact that there is literally no chance the US would ever supply the Soviets with that number of heavy bombers, what would have happened if they did? Would it affect the war in any meaningful way? Would it disrupt German eastern-front operations? Would the Soviet Union use the B-17 or B-24 as the basis for a post-war heavy bomber instead of the B-29?