1975-1986 Distributor Cap and Rotor Kit Accel
Accel Distributor Cap And Rotor, 4 Clamp-Down Cap, so you need to check your distributor to make sure this is what you have, the other is a screw down style, then you can go on to add the components that will make your car perform to it's total ability.
Also known under these part numbers: (For reference only)