mk3 and 3.5 are different , 3.5 has bigger diameter strut , 3.5 ball joint is different fitment from mk3 , trackrod end is also different size so if your putting 3.5 hubs onto mk3 you'll need to change bottom arms and track rod ends aswell
also cv's have bigger spline on 3.5 aswell but mk3 shaft will fit 3.5 joint

hope this helps

john


if your putting 6 speed box in , best bet is use all 3.5 stuff and get your custom made shafts modded
as said above one piece bearing is better