I've removed the three hoses on the distributor vacuum valve (https://www.428cobrajet.org/id-dist-vac-valve) , pluged the hose which came from intake manifold, put a new one from carb base to distributor vacuum advance (i've a single port unit) and to have a better finish (and no question from tire kickers about open lines) i've put a small hose between the two metal lines which go to the "electronic modulator". But i'm sure i'll have question on the distributor vacuum valve with its empty three ports ...