[Batman]

you can spray down the intake and T/B with carb cleaner, just remove the sensors first, that's as far as I'd go with that. Were you having problems with the injectors? If not I would leave them alone. If you already pulled them see if you can get new injector O-rings, if one cracks you'll have a fuel leak. I think apart from that Id leave well enough alone, getting too in depth on a 188K car is asking for trouble if it was running OK.