gearbox swap was straight forward, only problem I had was with 4.11 rear diff and half shafts that came with it..
2001rear diff half shafts were longer and male into diff were as bf5 4.44 rear diff had push in stubs..
removed 4.44 diff internal cage thing, swapped ring gears 4.44 to 4.11 so i could use existing diff stubs and half shafts that were on bf5 if that makes sense..
all works mint..