20G swap, no spark... STILL!

[fngearhead]

So I gave up on the 20G ECU and installed a 22T ECU yesterday. The ignition system and manifold harness have been carried over from my N/A motor, which was running fine with a blown headgasket before I yanked it. I have put the wiring back to stock N/A since removing the 20G ECU. I seem to be getting some signal voltage at the ignitor plug, but STILL no spark!! I've checked, double checked and re-checked everything and am now past the point of frustration. The only code I get now is 35, canister purge solenoid inop. which is fine because the engine doesn't have one. Can anyone point me in the right direction? I'm starting to have visions of Subie BBQ...