When I start it I have to keep pumping the gas to keep it going. Once it warms up I can stop but it still runs rough. Sounds like its missing but
timing looks good. Carb has been cleaned.
When running at higher speed it runs smoother.

This is either a leaky vaccum hose or hoses hooked up wrong when carb was cleaned. Think I remember having this problem one time and I messed with one of the hoses off the carb towards the front passenger side of it. Can't remember if I plugged it off or what. My motor has the air pump and air gallery taken out of it for more HP so quite a few of my vaccum lines are plugged or rerouted. (Shop manual should give you a diaghram of vacuum hoses:wink:)
Good luck,
Nick