The nut with the spring above it is your fuel mixture adjustment, when you turn the nuts out thats richer and in is lean, adj them the same, see where you are by counting the turns in then bring them back. Run car fairly hard for a bit on a highway and shut down coast into a rest area then pull a spark plug to see if you are rich or lean go for a nice tan color. as for your uni sync it's best to set them at a high idle.
Good luck, Wharf