If you have a Regina car then yes, you have the Bendix ECU, not an LHxx. The Bendix ECU's have a reputation for being bullet proof - probably the LAST component to suspect in your troubleshooting.

I'll assume you have verified, without a doubt, that you have spark and that your cam (and consequently the ignition) are in time.

You've replaced some of the typically suspicious components. You think you're hearing the pump, but is it really delivering fuel to the engine at the correct PSI? When was the filter last replaced? If your pump has never been replaced, I would really take a close look at that. Regina owners seem to report pump failure at around 150-175,000 miles. Another thing that can happen is that the pump's hose connection inside the tank fails so that you hear the pump running but it doesn't deliver the correct pressure. A pressure gauge connected at the injector rail could be very telling as to what's going on.