I have a GV in my GMC Dually with 4.10s; installed 1996 and it's been bulletproof.
Probably the best upgrade I've done to it in terms of highway RPM & MPG.
At the same time, its T400 got a rebuild.
Looking at the cost of an OD trans, and the cost of any rebuilds, it was the less-expensive long-term plan.
It's arguably a wash at this point, though, because the trans has been fine.
But it was also a less complicated way to get OD in the truck.
Not sure how that compares to the OP's needs & goals, but my experience has been very good.