Please don't rip me a new one, but....

The output shaft/tailshaft housing are different between a 2wd and 4wd. The nice thing about the 47re is that you would have OD and Torque Converter lockup.
I'll probably have to run a small stall converter, haven't formulated the size yet.
Definitely going to find a rear end with the factory 3.92 rear gears.

I think the 98-99 came factory with those gears.