Well, I started digging into the TPI setup I recently acquired. Everything but the Throttle Body looks good, and it looks really bad. Not just from a needing a cleaning standpoint, but some of the bottom torque heads twisted off before I could get them out. Rusted in place. I should be able to extract, but I am now a bit concerned about getting it to work. I planned to clean and polish the unit, but now I'm not sure if I should waste the time. Has anybody worked over one of these? Its off of an '88 IROC Z.