1972 1.7 not starting Options

[ctkellett]

I bought a stock running project car with a bad tail shift transmission. I pulled the motor and replaced the transmission with a freshly rebuilt side shift unit from 914 LTD.

After the reinstall I am not able to get the car running again.

Things that I have double checked

-Fuel Pump runs and primes when the ignition gets switched on at the key
-confirmed spark at the coil and at the plug with motor cranks
-can hear the injectors pump once while the fuel pump is priming and when you step on the gas pedal once.
-confirm that the timing is set correctly, that the points are gapped correctly.
- the car will run briefly on starter fluid.

Any thoughts? Maybe and ECU issue? Where do the injectors get the signal to fire?

Thanks!