Put a stroker engine in, with the crank from a 4G64 in there you will get the torque you need.
And keep the hot side of the turbo to a 6cm housing and you can have full boost by 1900 rpm. It will move a rock.

Cheers, Charlie
If It ain't broke, Modify it!
87 Montero turbo Converted back in Spring1989
95 Montero SR 3.8 DOHC Only one?
93 Pajero 3 door 6G75 Mivec with paddle shifted 5 speed
Then a Gen2 SR with full coil independent suspension.