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The 2.9l is fuel injected?
If so it has or needs a 2.9l fuel injection computer which needs the "timing" signal from the distributor so it can time the fuel injection based on RPM(the timing signal), thats called the PIP wire/signal.
This computer then sends back spark timing changes based on RPM and drivers input(foot on the gas pedal, TPS), on the SPOUT wire, Spark Out.
So there are two wires needed to the computer from the distributor module, TFI module, 3 wires if you count the ground wire
So if you have a computer then you have a place to connect the SPOUT wire.
TFI wiring seen here: http://www.therangerstation.com/tech...agnostic.shtml
EEC-IV = computer needed for fuel injection, they are specific to engine size and model year and engine options in most cases, i.e. EGR, Knock sensor, manual trans, auto
If you have a carburetor and no computer then you need a vacuum advance distributor, simple as that, and best to use an HEI module with that setup.