a 79 model year US model (except california versions) would have originally had a weber 30/32dhta 1/279 from your previous posts that many vacuum tubes are blanked off and the fact you have a 34dmtr I would guess that a previous owner has removed some of the original anti-smog gear. '79 models seem to have a bad reputation over there so it's not surprising that it has been modified (of course it may be that it is a 78 model just not sold until 79???)
Thank you I will post a pic today maybe it will be more help. and yes from the vacuum diagram i got from u it seems that all the emission vacuum line have been removed , thank u by the way.