IMHO I would reuse the stock one, as you are guaranteed it will fit. I personally have not had good luck with much of the repo stuff. I did two complete nut and bolt restos on A bodies, so I have experience. I had both clusters repaired and re-finshed and it was well worth it.
My list of fails includes:
Window crank handles....knobs pop off.
Barracuda Script..soft and bendy
Tail light lenses - don't even fit the buckets, gaps on the sides, poor plastic quality.
Flip top gas cap - do not seal and have to be re-drilled as they sit cockeyed.
Anodized tail panel - not finished properly on the sides so there are gaps, thin and bends by looking at it.
I know there are some more. I tried to reuse and refinish everything I could and it's definitely worth the extra time and effort to do so.