The biggest steam in the postwar years was the 746... The only 4-8-4 made by Lionel until the late 80s. Along with the 2-8-4 736 and 726, they are the only 8-wheel drive larger scale steamers.
The 671 also had 8 drivers, but the wheels were so small, and the engine so squat that it was not close to scale.
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