mmnn,so,the car jacked up,you offer the new wheel up,but the back of the wheel/the rim is hitting the suspension before you can bolt it up yer?....if thats the case you might get away with spacers.
its not really recommended the spacer lark,but there was store locally that had some NOS 'paddy hopkirk' spacer kits
i think they are good for about an inch/25mm or so....i'll call them tomorrow if that will help?