how can i get the magnum crank trigger to work without the computer?

Really? So if i run the factory trigger where do the wires hook up to from the trigger?

That all depends on what ignition you run. I can......and have made the crank sensor pass voltage right on the counter into a volt meter. No computer involved. They work regardless because all that's being done is passing a metal object by a magnet and creating a voltage spike. The computer has zero to do with that.

You will need to get the polarity correct and determine where the crank pickup needs to be connected to whatever ignition you have, but it will trigger it.