Help no spark

Remove the distributor connector and with the key on, ground first one then the other (because I can't remember which) of the dist. connector wires leading to the box. Each time you ground it, you should get a spark

Make ABSOLUTELY certain the box is grounded.

Plug your multimeter into the distributor connector, set on low AC that's right AC volts and crank the engine. The distributor should generate about 1 V AC

With everything hooked up, hook a clip lead direct from battery (starter relay) to the coil + terminal, Crank and see if you get spark

HAS THIS been running and quit, or is this a new conversion?

Try checking spark first using the key, then by cranking the engine with key in "run" but by jumpering the starter relay.

Are you using new parts or junkyard parts?

Especially if junkyard, inspect all connectors and terminals with a light for corrosion and damage. Work the connectors in/ out several times to scrub the terminals clean, and to feel for tightness

Inspect the distributor for rust / debi / strike damage to the reluctor and pickup. Get a brass .008" (inches, not metric) feeler at O'Reallys and set the reluctor gap.

CHECK the wiring carefully. If you have a tach hooked up UNHOOK it.