It will all go straight on. The only Corrados that got golf 3 mounts was the VR6, and very late post 95 models. Even if it had MK3 mounts it would still fit if you put the whole lot on together, the MK3 top mounts are supposedly a good upgrade for strength.
The non-MK3 setup Corrado stuff is identical to MK2 golf suspention, using same top mounts as MK2 G60 just slightly different spring poundage (though the rado springs are listed for a random jetta model).