Be careful about doing what Cudajon is telling you to do. You have your vacuum hooked to ported which in my world is how it should be done. He is telling you run vacuum straight to the diaphram which will pull vacuum at idle.

I would say start with the carb, make sure the transition slots are good and try to get 20 degrees of initial timing. As long as your starter can handle it you are good to go and you can keep your advance ported. Check the floats.