JW51,
I’m running a Langdon's Mini HEI.
You are not required to run timing control. That’s the way I’m running mine, fuel control only.
The ECU only requires a signal from the negative terminal of your coil for fuel pump control. If the engine stops running with the key on, say due to an accident, the ECU will disable the electric fuel pump.
If you go on Speedways website and look up the Sniper EFI 550-552 and page down a bit, you can print out the QUICKSTART MANUAL and the INSTALLATION MANUAL. Both excellent manuals with easy to follow instructions.
Hope this helps.
