[Dave at Pelican Parts]

Springs and shocks. Maybe an aftermarket sway bar if you feel the need; most of us deal with rear roll stiffness using the springs. Have the hubs drilled in the five-bolt pattern and studs pressed in so you can run five-bolt wheels all around, assuming you want with 911 struts and hubs up front. That's about it; some people put larger brakes on the rear, but the fronts do most of the braking so I don't think that is a necessary upgrade.

--DD