1968 Valiant...

Welcome to FABO! As a beginer in the car hobby, I suggest you join a local club or get together with some local FABO members. They could take a listen and give you some advice better than trying to do it over the net. If you want to take a video with sound and post it, we'll listen and give you a million suggestions! As for a vacuum diagram, on a '68 model, there really isn't much to it. One 1/2" vacuum hose to the PCV valve, a tiny one from the carb to the distributor vacuum advance, a breather hose from the air cleaner to the valve cover breather, and a tiny choke pull-off hose on the carb. That's pretty much it. Good Luck!