Fuel pump relay?

Okay, so you got it to at least run? Or was that before? If you can get it to run but it's bogged down and stalls out. I think you can use a bore scope and remove the PCV connection to the upper intake to look inside. What you don't want to see is any fuel. GM put the pressure regulator inside the intake. Older system + new fuel pump may have ruptured the regulator. Because of its location it can dump a lot of gas inside the intake very quickly. Another test for it would be to get a pressure gauge and install it on the return line. Now trigger the pump. It should shoot up to 55-65 psi. Turn off the pump. The pressure should hold for a long time because you have a good pump, and the return line is blocked. If the pressure drops quickly, you have a leak. Now if it has a bad regulator and you also have the old spider injector. Get the new replacement unit that has the individual injectors and the updated lines if you're so inclined. They are a great addition to a runner, mine picked up almost 1 mpg adding that unit. I really can't think of anything else that would dump fuel in there that way.

Test ground by running a jumper cable in parallel to the current ground. One clamp on ground post one on engine block. If it suddenly works you have a bad cable. If not, you didn't spend money. OOOhh P1361 - Low voltage to ignition system! That could stop it from firing and burning the fuel. This might help

The enhanced ignition system provides the timing input to the Vehicle Control Module (VCM) with a crank sensor. The VCM uses this reference pulse in order to determine the individual ignition spark timing for each cylinder.

Once the VCM calculates the ignition timing, the ignition coil module on the Ignition Control (IC) circuit receives the timing signal. Each timing pulse received by the ignition coil module, on the IC circuit, triggers the coil module in order to operate the ignition coil. The secondary ignition voltage is induced, and then the secondary ignition voltage is sent to the distributor for distribution to each spark plug. This DTC is a type A DTC.

The IC signal voltage ranges from about 0.5 volt to 4.5 volts.

CONDITIONS FOR SETTING THE DTC
The engine speed is below 3000 RPM, and the voltage on the ignition control circuit is below about 0.04 volt.

DIAGNOSTIC AIDS
A poor connection, a rubbed through wire in the insulation, or a wire broken inside the insulation will cause an intermittent.

Check for the following conditions:

1. Poor connection
2. Damaged harness Inspect the VCM harness connectors for the following conditions

Backed out terminals GR 9 and Bk 18.
Improper mating.
Broken locks.
Improperly formed or damaged terminals.
Poor terminal to wire connection.
Damage harness.

3. Intermittent test - If connections and harness check OK, monitor a digital voltmeter connected between VCM terminal GR 9 and BK 18 while moving related connectors and wiring harness.

If the failure is induced, the voltage reading will change. This may help to isolate the location of the malfunction.

TEST DESCRIPTION
The numbers below refer to the step numbers in the diagnostic table above

2. If the engine starts at this point, the DTC 1361 is intermittent.
3. This check determines if the IC signal from the VCM is available at the ignition coil module.
9. The remaining tests begin to check that the ignition coil module circuitry is OK. If the ignition coil module loses its voltage source, the secondary voltage will not be produced, and a DTC P1361 will set.

I would check for voltage at the coil, ICM and crank sensor using a test light. A meter will show voltage if even one strand of wire is OK. Another thing will be to check the ground from the ICM and coil. The ICM grounds through pin C the coil grounds through the body. OH on the ICM, apply some compound to it, those have a very bad habit of frying from heat. It's why the one in my 2002 was mounted to its own heat sink.

Borrowed some of that from service info. It's stuff you learn but I don't type as clearly as they do.

G9 isn't likely the problem, if it was you would get a different error. You want to check the voltages at the other three. Then the ground on the ICM. That would be more likely.