Check the inside of the dist cap for hair line cracks. I would just replace it and the roter. Secnd thing I would do is make sure all the plug wires are good. I have seen them burned in the ends where the clip is crimped on. And for gods sake make sure there held in place with the clips. There cheep and they save shorting. You might want to go out in the pitch dark night and start it open the hood and see if you have any sparks jumping from plug wires and on the coil conections. Thats my thought and I agree set the timing to 12' with the vacum unhooked and at 2000 RPM. Thats just good advice he gave you! | 
