Please help me

[mjp01243]

I am having some serious electrical problems. I have a 69 camaro with a few aftermarket electrical devices. My electrical system consists of stock wiring harness, msd 6al, msd timing control, petronics electronic distributer conversion in a stock style points distributer, petronics coil and 110 amp alternator. Everything has run perfect for over a year now but these last couple of weeks have been very rough for me. While just cruising around my tach will randomly search around and then my engine will die. If I give it a little bit of gas while still moving the motor will sometime comeback alive. Then sometimes Ill be at a steady speed and it will start puttering and back fire a bunch of time and then die. I tracked down some of the problem to a cut sparkplug wire and a bad ground. After fixing both of these I still have the same problem and it only getting worse. Any help or advice would really be appericated.