early ones were 2E code, basically they had same code as equivilant Golf year, same story with some passats and corrado.
to go 5 stud you need to change the wishbones, bearing carriers, outer cvs and the anti roll bar. change to 280mm brakes if it doesnt have them already, but i think they do.
can avoid roll bar swap if you change to B4 passat 5stud wishbones though. another option is to keep the wishbones and bearing carriers, then press 5 stud hubbs into them,. still need to change outer cvs though.
then you'll either need to get your discs redrilled to 5x100, or buy early passat vr6 ones which are VW only:
357 615 301 A - 280 brake disc, 5x100 - 38.83+VAT