Skyline rims will fit but I suspect the offset will be wrong. Mk4 Supra rims fit and have the correct offset; I've seen quite a few mk3's getting around with these.
they might look a bit out of place id imagine. If they only have a 35mm offset.
The mk4 rims i have cost the fella before me not much at all...its about being patient and looking around Mine are 9" rears and 8" fronts and are charcoal in colour - offset of 50mm.