Engine runs rough throughout driving range

1977 Ford Bronco 302 V8

Engine began to run rough during idle and throughout driving range.

I did all the obvious:
1. Changed the spark plugs and wires
2. New distributor cap
3. New fuel filter
4. Cleaned carb w/ cleaner
5. Made sure all hoses were connected

After all of the above were changed the engine continued to run the same as before.

Seems there is a slight knocking if you listen real hard. The bronco starts right up, seems to accelerate correctly. It is just rough with maybe a little lose of power. Kind of sounds like it is not timmed properly? Is this something that would happen while driving?

Please help leed me in the right direction!