Is this a 489?

Jadaharabi said

I may be wrong but I believe that big 9 cast up on the housing there tells you that it's a 489 housing also.

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All 8-3/4" carrier assemblies can be identified externally by the casting numbers. Additionally, the '741' commonly has a large X cast on the left side, the '742' may have a large 2 cast on the left side, and the '489' has a large 9 cast on the left side.