The G60 on the Corrado stills boosts the same as a g40, since the cylinder capacity is larger which compensates for it, therefore fitting a 68mm pulley will still pull 1bar boost on the G60 engine.
RichieK used to pull 1.5/1.6bar on his G40-G60 Conversion.
On the Eaton, iirc ChrisG40 was pulling 18psi on his AWT eaton conversion, could have been 22psi, can't remember. It didn't hit max boost straight away, like the G60 conversion does, the eaton will build the boost so max rpm would find you max boost.
Either way, you'll need a larger map sensor period.