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I ran into something like this, it might help. I used the entire 87FC harness when I swapped my 13B EFI FC engine into my 79SA so I'm not really familiar with the GSLSE harness. If it's similar (which it should be), your power for the coils will be coming from the main relay. Check to see if the relay is working when you turn on the key. If so check that the battery power is actually crossing the relay and making it to the coils. I've seen several people, besides myself, have this problem. It drove me nuts for a week until I figured it out.
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