Good Afternoon Forum Members: My question I believe is a simple one but I need clarification. I have two Lionel F3 bodies that I want to add power frames on complete with motors. My question is are all Lionel Postwar F3 shells structurally the same? I pose this question because I've had previous F3 bodies and shells and when screwing them on they give a slight difficulty in putting them together. I await your answers. Thanks again
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