My chassis build

[Bonzo]

I forgot to undo the hub nuts on my first donor

Should know better but forgot anyway

My rattle gun at full tilt wouldn't shift em.

Ended up using a 1" drive socket & T bar + a 6 foot long scaffold pole . One person standing on the subframe & another person standing on a long flat pice of 12mm thick bar that was trapping the wheel studs.

If you don't want to damage the studs, put a tiny piece of rubber hose on them ( The donor will have plenty spare )
If you do damage the stud thread, don't worry, simple to replace & easy to get hold of

Good luck, those nuts are about as tight as it gets.