I've tried a few different chips I had. I have 2x 6510 and 3x VIC's from very different different dates). unfortunately the 8500 I had doesn't work.
I now have a combination for which the screen is better (still artifacts).
Still had to use these settings for Ultimate II v3.7:
CPU Addr valid after PHI2: 120ns
PHI2 edge recovery: Disabled
I'll leave it at this. It's not that I use it very much, thanks to all the trainers build in the games these days. Can't remember that the games I had in the '80 had them, but it's makes playing a lot easier.