I just swapped my 96 impala lt1 into a 94 z28. I used the harness, pcm and auto trans from the 94. I have no spark coming off the coil. Is there anything that's different about the opti spark writing or anything different on the 96 Motor I need to change?

 

This might get more attention in the Gen II section. This forum is mainly Gen III-IV LS-type engines