AS I recall the original ti was set at 39 deg total advance, but that may have been with fuel of the day. I spent a lot of time fiddling with twin webers chasing similar problem only to find that my problem was not enough advance (thanks to Jeff Ireland). Did the total advance setting - about 33 deg all in - and things improved immediately. In this case, maybe the advance is close enough, and real problem lies with air leak or carb adjustment. That said, I can't imagine how the car would run on 65 deg advance.