If you are going to W&P bring any suspect components with you & I can test them ie capacitor, rotor arm, distributor, coil, leads & sparking plugs.
These are not simplistic tests with a multimeter that can be misleading or pointless. The capacitor needs to be tested at its working voltage 300-500v & the HT components I can test at 5Kv. I have built a coil tester which can run the coil & you can see the HT produced.
It is true that most automotive capacitors are 0.2 mfd & will do a satisfactory job. It must be a distributor capacitor as it is rated at 500v. Using say a suppressor capacitor will cause failure as it will be rated only just above the vehicle voltage.