* Different Engine Management Systems: The 1983 Camaro uses a very early, and quite different, form of electronic fuel injection called Crossfire Injection. The 1992 truck likely uses a much more advanced system, probably TBI (Throttle Body Injection) or even early sequential port fuel injection, with a completely different sensor suite and communication protocols.
* Wiring Harnesses: The wiring harnesses are completely incompatible. The connectors, signal types, and even the voltage requirements may differ.
* Sensor Differences: The sensors used to monitor engine parameters (temperature, oxygen levels, throttle position, etc.) will be different and the computer will expect specific signals from the 1992 sensors, not the 1983 ones.
In short, trying to use the 1992 computer would be a futile exercise. You would need a computer specifically designed for the 1983 Crossfire system. Even then, getting it to work reliably might prove challenging due to the age and potential wear of components.
