Had 2 Eatons now in VY series cars.
The first was a bit clunky but it was behind a cranky manual. Still performed mint.
Current one in the Monaro is a lot better.
Powertrax look like a torsen style which is what the Eaton/Harrop units are. They will still single up if they get super low...
This mod might make the car at least drivable until you can sort it out properly. Or leave it as is to be hectic! lol
For my knowledge, can you just swap bellhousings on the 60e's to go from ecotec to LS1 / 5L??
If you don't put up who done your tune, how can people research like you said? If old mate has done a **** tune, wont or can't fix it, put it out there so other people who may not be in the know don't get burnt.