Half Shaft Mystery

[WVZR-1]

my question is : is there a chance these alum. half shafts were intalled at the factory on such an early car, or have they been replaced? It seems very strange that they would be replaced with such low mileage. I found the following part numbers on stickers on the shafts: right side 14041925 - AR8??3, left side 14041925 - AR5033.

The part # is/was a "production" shaft used for very early C4's. It has "service/replacement" applications in early parts catalogs for '84 MY only. I would have guessed the AR5033 to be a date code and my thought would have been '85 33'd day of year. The AR8??3 though would seem to disprove that. It's I believe though very safe to assume they're "replacements" and not '90 MY production parts.

Here's a thought for you! The car left on a "test drive" with the "steel" and returned with the "aluminum"!! More difficult "swaps" have been accomplished!!