The key distinction of the Later 4L60-E (1997-2006) from the Early 4L60-E (1992-1997) is the six-bolt "hex" rear output or tail-housing / adapter pattern. The previous versions featured a four-bolt square bolt pattern at the adapter or tail-housing. Additionally, the removable bell-housing is also another distinguishing feature.
In short, you can use the later 19997 4L60E transmission or you can upgrade to the 4L65E in your Jimmy. Just make sure you have the right boost valve size for your Jimmy's application.