I would start with replacing all the ignition parts. A new distributor cap, new points and condenser, new pugs, and new spark plug wires. If that does not smooth thins out. Think about rebuilding the carb. It only takes 3 things for an engine to run. Gas, air and spark. After that it becomes a timing issue with the motor itself. Model T motor's are very basic and the easiest to work on. No censors or computers to work on.
