I need to identify my chassis number so i can order the correct brake booster vac line. Seems like there are three options.

I ordered this one and it's way too short: 1234307429

There are also these two:

1234301329
For models with chassis serial number through 164520. Cohline - Power Brake Booster Line; Brake Booster to Vacuum Pump; 1 Inline Vacuum Connection; 34 Inch Length
Brake booster to vacuum pump; California Cars; Up to 164506; Manufacturer Body Code: 123.130
Brake booster to vacuum pump; Federal Cars; Up to 164520; Manufacturer Body Code: 123.130

1234303929
For models with chassis serial number from 164521 through 202852.


My VIN number indicates that the second one would work -- but the stamp on the chassis by the radiator does say 123.130. So maybe it was a slightly earlier body used with a later vin?

I'm leaning towards 1234301329, especially because it sounds like it's longer at 34". Does anyone know the length of the second one, 1234303929?

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1980 300D, 128K