The big thing to remember in regards to torque converter stall speeds is that it is just an estimate. Engines with higher torque, or in a heavier vehicle will stall higher, engines with less torque in a lighter vehicle will stall lower.
From what I can see by looking at various online parts specs, the Fiero automatics had 2 different torque converters.
GM72 with a 2060 stall was the primary V6 torque converter and the one used in every 88 regardless of enging. This converter was also optional from 84-87 on the 4cylinders as well. The codes for this one are: FJAB, FJBB FJ2, FJ2B, FJ4, FJ4B, FJ9B
GM73 with a 2385 stall was only used in a portion of the 4cylinder from 84-87. The codes for this one are: FC1, FC1B, FZ1, FZ1B, FZ2, FZ2B, FZCB, FZ3, FZEB, FZPB, FZFB
Here is an incomplete list of other torque converters compatible with the 125C/4T60
GM40: 1630 stall
[This message has been edited by fieroguru (edited 01-06-2013).]