Xentrix,
Your radio is suffering from RFI Radio Frequency Interference. Go to Radio Shack and get a 2000 MFD 25 volt Electrolytic Capacitor and a Radio Interference Filter (coil of wire). Insert the filter between your radio hot wire and the 12 volt source. Connect the Capacitor between the radio hot wire and ground. One side of the Capacitor is pos, the other is neg. This will cut out the tick tick tick from your points, and the whine from your altenator.

For those of you that like to swap radios from one car to another, keep in mind there is a small box or tube attached to your hot wire. This is a Radio Frequency Filter, it's there for a reason. Don't cut it out of the circuit. Take a good look at it, some cheapo companies like to cheat and put a fuse there instead. They sell filters for $20-$30. Save your money, it's only a capacitor and coil, build your own for $3-$4.