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pre-75 or 75 hub?

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72GT

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rust + magic = gold!
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Discussion Starter · #1 ·
What is the difference between a pre-1975 and 1975 Opel hub? Here is a picture of my current hub/rotor. I'm wondering if this is the stock setup for a 1972 GT or possibly it has already been upgraded to the 1975 Manta hub and bigger brakes.

Thanks,
Bob
 

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72GT
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