Well I'm now the proud owner of 2 Fieros! I picked up a nice little 85 GT V-6 this weekend. In looking over the engine I see that the detent cable is a bit frayed where it hooks to the transmission. I was looking through the Fiero store and they don't have a detent cable listed for my year. In fact, the ONLY detent cable I can find in there is listed under 1987 4cyl! I was going to swap my detent from MY 1986 4cyl (currently not running) but the cable is too short on the 4cyl model.

Anyone have a suggestion?

Have you tried a Pontiac dealership? If I remember correctly that is where I bought mine.
Occasionally you can find them on Ebay as well. (Just checked and none are listed today.)

haven't tried there yet. just got the fierostore catalog yesterday and was looking through there. they show a photo of a v6 and it says detent cable..but when you look up the part # its for an 87 4cyl.