Jap gearboxes such as the 2wd triton,L200 have a 1 piece bell housing and gearbox. I would gather the 4x4 is the same, only the Australian Borg Warner gearbox had a removable bell housing. The only suggestion I could think off is to get hold of a starion block which are wide bolt up, or early triton 2litre then use all the vr4 engine internals