How would a boxer engine squeeze in?

Not so much a Rexxy 4 banger, but rather the 6 cyl from the liberty?
Massive amounts of torque, would sound absolutely killer wuth a free flowing exhaust and intake. ITs build would keep it low too.
Or maybe the V6 engines kicking about?
The suzi V6 will fit straight onto the sierra 5 speeds (with the divorced transfer case).
The Mitsubishi 6 cylinders also give big numbers from relatively unknown (and cheap) source.