I built a simple electronic boost controller for the 87. It consists of a pressure switch which is fed boost from the manifold.
http://i.imgur.com/1v4fyB6.jpg
And a solenoid valve that was originally used to control EGR on my old 2.6.
http://i.imgur.com/DCqEANx.jpg
The idea is simple. Below 13psi the valve feeds vacuum from the vacuum pump to the wastegate actuator in order to keep the wastegate shut tight. Above 13psi it switches to sending boost pressure to the wastegate actuator. This prevents wastegate creep (look it up) for faster boost response and controls max boost. At WOT it can reach 13psi at 1800rpm instead of ~2400rpm stock. Once at that peak pressure the boost gauge fluctuates between 13 and 12 psi as the circuit quickly pulses on/off. Works beautifully and makes the car much more responsive at part throttle and low rpm. Theres a steep hill on my way to work that I can climb in 4th gear instead of 3rd prior to this modification.