small hesitation off idle

I'm not a expert on tuning the Eddy carbs, and while that may be some of the problem, with the Hughes cam installed, i'd think that engine would be much happier with the initial timing at least up around 12/14* vs the 5* you have it now. And, where is the vac adv hooked to.....ported or full vac? I'd try bumping it up and see how it reacts. You need to get the timing right first, and then play with the carb if need be.