Ok, things have changed. I have bought mendeola a-arm suspension (not yet arrived).
Really have decided to use 18" rims, like 3-piece one used or new. Kerscher wheels are nice because you can choose ET.
Planning to go reasonable
, so front 7,5" wheels and rear 9,5" wheels. Wonder what et would best... Maybe at rear 60-73mm and front about 40mm
http://www.kerscher-tuning.de/raeder/index.php?id=2