If there is no spark, it could be due to bad distributor cap or rotor, faulty distributor. It can also be due to a bad ignition coil.
It can also be due to the coil not getting any power.
I have attached the coil testing procedure below. Also included the diagrams for your reference.
Please let me know of any questions.
Images (Click to enlarge)
Tuesday, October 12th, 2021 AT 1:22 PM