Pulse points as in the set at the bottom of the distributor on D jet FI or the points under the distributor cap that typically trigger the ignition coil or ignition box on some MB?

If D jet points, I'd be tempted to make a shutter wheel and use through beam optical sensors + some circuitry. Omron and others make a u shaped transmitter / receiver that is sub 1" x 0.75" x 0.325" https://www.ia.omron.com/products/category/sensors/photomicro-sensors/slot-type/index.html
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If the under cap points, some install a Pertronix electronic ignition kit.

A 90's GM DIS brick ignition system could be made to work, the GM 4.5 ish Cadillac V8 used these as did many 4 and 6 engines. ( 2 of the 4 cyl packs could be used )

You would need a crank trigger and some method of developing an advance curve. Someone is bound to have done this before.

If you are going to make an engine swap, a GM 4.3 V6 , 5.0 - 5.7 V8 throttle body injected from a 90's pickup / fill sized car would be easy project from the electrical side of things. ( assuming the engine fits under the hood )