anybody know the in's and outs of coverting to 5 stud 5x98 off an alfa is it just hubs + discs front and rear or is there more to it than that

Dunno exactly - Barbz would know as JohnS had it on his coupe.

There's a little more to it then that, you'll need to convert the rear hubs so that the ABS ring matches the Coupe set up, fronts are easy as all you'll need is the Alfa flange plates.

JohnS's wheels are now on my Vinci