I have pulled the carb apart again and there was no dirt inside. It was clean.
In any event I went through and cleaned again just in case a passage was blocked. This time I even removed the idle tubes and they were clean. I also pushed wire through all the opening.
Sadly though I am still with this terrible idle. When I start up it is fine and as soon as the motor starts to warm up, and you go around the block the poor very rough idle returns. I can confirm there are no vacuum leaks.
This problem began when I swapped out the float bowl as I was not getting a good squirt from the previous bowl which seems to have improved with the bowl in question now, the hesitation is no longer present.
I am wondering whether there may be an issue with the float bowl. I was told by a buddy that perhaps there is fuel leaking internally on the idle circuit.
Please help me diagnose this. I have opened the carb so many times now, the airhorn gasket is looking a little tired now