I did some research on these engines for an LCCA club magazine article in 2009. Over a fifty year period (1950-1990), Lionel produced 60 models of this engine in 24 different road names (also 3 military and 6 private brands). One of the most popular road names was the blue Santa Fe #634. This engine was also included in some sets, which it appears you have. They were all conventional with a universal motor and an E-unit. The ones I have are still operational.
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