Quote:
Originally Posted by EZ Nova
So, ordering a 4.88 gear in a L78 Nova, it became a COPO?
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No. For 68 and earlier, it was just an RPO.
By 69, they were clamping down on the axle ratios, probably due to warranty costs. Ordering a 4.56 or 4.88 in a 69 Nova or Camaro required a COPO.