i would double check all the float bowl levels. center just to the bottom of the hole and the outboards flowing out. if the plug was still there it should be half way up the hole. this is important!! if that is all set then i would take and give an extra 1/8 turn to all the outboard idle screws. take it for a ride and see what you get. now it is a matter of doing one thing at a time and see what the results are. seems like you are really close.

i don't remember, what is your timing at? initial and total mechanical and what rpm is it all in.