Possible Ignition issues in a 41

[30aadoodlebug]

So the 41 is running rough and chugging. blue/black smoke only out if the left tail pipe (duals). When she backfires, or goes up hill, it comes out both. The fuels system has checked out. Rebuilt carb and such. I have replaced the condenser, and have checked to make sure I am firing on all 8 plugs. I have a good strong spark to all 8. The car is vibrating hard and acting like a vacuum leak, but all lines have checked out. Im lost on this one.....