Really hard to find good photos of the Calibra! Someone out there needs to take one apart and do a photo session, and feature that awesome drivetrain.
I found some model photos that illustrate the engine positioning benefits it gave, as 747 pointed out, compared to the Alfa. You can see the driveshaft locations here:

Alfa engine fully ahead of front axle:

Calibra w/ hood off showing inboard suspension and front driveshaft:

CFD study of ITC/DTM Calibra:







Source: http://www.v6calibra.net/docs/calibra_a ... ynamic.htm