Torque converter difference

@TrailBeast I do have a A500, right? I can't find any casting numbers on the case, but I found a number on the tailshaft. It's: 4461036F, which comes up as a 518 tailshaft. In know you can swap 518 and 500 OD units.

The pan does resemble a 904, so I think I'm good, but I need confirmation.

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