Slant 6 spitting

Gents, I would like to throw out a huge thank you,
My problems rested with the timing, I had purchased the Voltage regulator, ballast resistor, and the ignition control module, I changed all of those, checked the timing "Which was off by a little bit" and now she is running a lot better. This morning was the first time I had driven my duster farther than the end of the block. Thanks much