Another day of tinkering
I had to put new fuel pump in, then battery was to low to turn the starter fully. Jump start

.
Then engine mounting screw went (how, i don't know, but it did). When I fixed that and the engine finally started it was running so poor, I nearly cried.
Fortunately it was only points had to be adjusted and a little turn of the carburetor screw, and it runs like a dream again.
Didn't had a chance to road test it yet, (heavy rain as usual), maybe tomorrow.