Rough running engine

[kimlinh]

My recently rebuilt engine runs rough. It starts and idles fine (when its running on the idle jet). But when I drive it the engine has a more or less steady miss. The more power I use the more intense the miss is. At first I though it might be electrical. I replaced the condenser. No change. I don't think it is a leaky manifold, All the spark plugs look the same. They are not wet and they don't look like they are running lean. I've also tried 2 different rebuilt carburetors. ( rebuilt by the same guy, me, so maybe that's the problem) Does anybody have any ideas?
Thanks in advance