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Do you have a timing light?
What distributor, what carburettor, and what's done to the engine?
Has the engine ever run in this setup?
Sounds like your ignition timing is wrong.
Has the distributor been fitted at a static timing figure of say 15 BTDC?
I would open the spark plug gaps up to .035.
Do you need any further help?
I hope my advice has been of assistance to you.