The body shells are ex-Kusan EMD F7 tooling, with the Kusan "humpback" problem resolved (why Kusan did that, I don't know), but still having the improper (for an EMD) nose contours. They're cute, though - and look more prototypical around the windshield
than the Lionel-copy F3's.
Modern, improved (same underneath as the F3's, I guess; flywheels and so on) iterations of these F7's are still being offered and or made - or have been only recently retired?