Don the vacuum gauge method is new to me but I can see how it would work. While it probably would not work on the modern tech cars of today I don't see why it would not work on cars of the 70's. My method of timing under a load needs a fine hand and a good ear as does my way of adjusting a carb needs a good ear. But then again I been doing it for over 40 years. Both methods were taught to me by my father who served his mechanic's apprenticeship in Germany before getting out with his father who also was a mechanic in 1932 before Hitler took over. On new cars I haven't a clue. That's why I have 2 74 Hornet's and my newest car a 77 Chevy beater. "Doc" _______________________________________________ AMC-List mailing list AMC-List@xxxxxxxxxxxx http://www.amc-list.com/mailman/listinfo/amc-list or go to http://www.amc-list.com