In principle you can turn anything on a mini-lathe that you can turn on a Myford, except you don't have a gap in teh bed making the practical limit 7", so as long as you don't want to make a Stirling Single you should be ok.
You will need some ingenuity and fiddling to turn parts greater than about 5" in diameter – use a RH tool held sideways in the back of the toolpost for example. Facing large surfaces may need multiple too settings.
I have also turned the outer diameter and grooved the sides of the rim of a 6" diameter laser-cut steel flywheel on my mini lathe.
Neil