I am back!
and indeed, the setting was off.
pulled the vacuum loose and closed it off, had the motor running at idle, about 700 rpm
Timing was at 0 to +1....
loosened the distributor and turned it counterclockwise. I could hear the engine rev up. NICE!
Put the timing light back on it again and it is now set a about -10 to -11. Which is just fine on LPG I heard. went for a ride.
first connected the vacuum again, and no difference. No vacum advance. strange.
the vacuum hose is connected like the red line in the picture. disconnecting it does not change the rpm or anything. The hose can not be bad, cause that would mean I would be running a constant vacuum leak. and the engine seems to run OK. I wanna check later on using the other connection at the arrow. Would that be OK?
so...to be continued!..another step closer to better mileage!