A good start is to check if the secondary on the carb is working. The diaphram tends to leak with age and no secondary = no power.

The part is located near the throttle cable and has a rod that reaches to the secondary throttle. Unhook the line to it and see if it holds a vacuum.

Kevin

87 Turbo Intercooled Raider, roller cam, torsen rear diff, LSD front diff, lockup auto with modified converter, V6 brakes, low transfer case gears...