Northwest fab black box is the move. You can get it split case on one end and GM on the other. And it’s a 2.28 (i think) reduction gear so you’ll get 2 low ranges. It’s the move. If they have one for the 6l80 I think I’m going to go with thag in the futureAre there any other options for GM to Toyota adapters? I've only seen the Advance/Marks for sale in USA, can't recall if some of the swap threads on here were based elsewhere and just using a GM drivetrain