Margallar is right. All the kabli cups and rotors I checked were sand papered, brutally. So I bought YEC rotor, distributor cup and it's cup O ring for 470rs.
Results: fixed missing problem at certain rpms, better fuel economy, better starting, better acceleration.
Cracked, yes from red intake thing, they connect there to vacuum solenoids, not to diaphragms. If they dont work, reverse the pipes on vacuum solenoid.