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Default Want to build a HEI ignition module similar to 70's style

Does anyone have a schematic for a simple four pin HEI ignition module
from 1970's+ ignition systems. They appear to contain an SCR and a
pair of diodes and resistors.

Pickup Coil connects to two terminals and battery and induction coil
primary the other two, mounting screw provides a ground connection.

Original type mounted to the distributor plate on GM cars and others
and was ~1/4 round shape - I want to adapt it to a motorcycle that has
pickup coils mounted remote from the modules.
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