Two dead cylinders on a 59ab

[rockfla]

[QUOTE=Planojc;2415794]Update, Today I changed out the crab distributor, condenser and cap and I now am running on all 8, with steady vacuum and the car doesn't shake. still clueless on to what is going on with the distributor, but plan on sending it off to be checked. Thanks for all the inputs.[/QUOTC


Can you fill Us in a little more....Was this the "Same" rotor as when you were having the issue?? OR did you use a "different" rotor on the replacement distributor to make it run correctly??