No spark

So decided to try keeping it the way it is...so here is what has been replaced: new coil, ballast resistor, cap and rotor, pick up and reluctor wheel, wires and plugs.
I have wired it correctly, only thing not replaced is the ecu.
Still...no spark.
Reminder...the motor is a 1972 318 , wiring is the 64 cuda.
Did a 1972 dodge 318 use an ecu?
Can a 2 wire distributor be wired without the ecu?
The new pick up in distributor has an orange and black wire.