If you only swapped the head and the block rather than the entire engine, then I don't see any obstacle to passing emissions (inspection?) So long as you remove all emission components -including sensors- from the 92 block and head, and swapped them for the emission components and sensors from the 96 engine.
However like you said, the OBDII system is different, and if the 92 block and head will not accept OBDII components, then you might need to go with a 96 engine.
Double check the 92 block and head you put into the car to see whether or not they will accept 96 emission components and sensors.
Clarification: when you say you have one spark per crankshaft revolution, do you mean one spark per sparkplug. Or just one spark and nothing else?
Friday, January 26th, 2007 AT 8:28 PM