No problems with the vacuum advance getting in the way- there's plenty room to spin the whole thing probably a good 30 to 40 degrees.
Maybe it sounds like the timing is off simply because the final radio of the valvetrain is 232 duration/.466 lift and I've never worked with something like this. The 3 guys that were out helping me (non mechanics) as well as myself figured it was either a timing problem, carb tuning problem, or a combination of both.....
Yeah it's got a fast idle cam but I haven't done much research regarding choke timing/fuel mixture. I'll probably work on it some again soon- it's been raining off and on.