after you check your wires plugs and coil to make sure everything is ok check the springs on the two outer vacuum pods, you might have to put heavier springs in them if your plugs are running black, I have the heavy black springs in mine since I use it for a daily driver but run the yellow spring in the front and the purple in the back so they are slightly staged. also check your float level on all three carbs, helps if you have an electric fuel pump, I have had to replace all the float bowls on my carbs due to old age, holley also makes a better needle seat assembly that will give you more adjustment, sorry I dont have the # for them.
Also check to make sure your mechanical advance is working and your vacuum advance is not leaking, I had those problems also.
