I just installed a new stock type distributor on my stock 289 65 Mustang. It came with the old style points and condenser. I had been using the Petronius igniter in my old distributor but I decided to give the points a try since they were new anyway. Well to make a long story short when I installed the new points and condenser in the new distributor the motor fired right up and ran smoothly. But the engine shakes tremendously on acceleration and when I installed the Pertronics set up it did not run as smoothly but the engine did not shake on acceleration . Has anyone ever seen the Pertronics igniter go bad? It has a stock coil I do believe. I recently put in a new Timing chain and made certain that the dots on the sprockets lined up at 12 and 6 o’clock. I have also adjusted the valves several times. Any help with this problem would be appreciated.