SOLVED! (almost)
The new coil was labeld wrong (+ and - tags swapped)
I then retuned the carbs and the ignition with professional equipment (Osciloscope/Co2 Meter), and set the valvelash again (was still to tight when hot). Now it purrs like a cat in the creamery and I have equal compression on all cylinders.
The Exhaust tube comming from the front header is still a bit cooler but who cares, she runns like hell and I get good milage.
It has so much torque that I can drive around in town in third gear like an automatic almost without shifting. The exhaust sounds nothing but sweet and I would get even better milage if I stop reving it all the time yust to hear that exhaust note ;-)
With the help of the forum I also solved the oil problem.
She is going now much faster than you want to drive with this tires and suspension.
In 2 weeks there is the anual prewar quatermile race. Let`s see if I can winn a price.
The only thing left is that the engine is getting hot when I go more the 75 mph.
The cooling system is in good shape, I stuck in a traffic jam for 2 hours yesterday - no temp problem. Only at high speed.
I think it is a timing/advance problem.
I got a Malory distributor without the vacuum advance. It has what Patrick`s call a "tailored curve" in his catalog. Has anybod ever found a good spring combination for this?
Thanks a lot for all the help, Frank