ok so I'm ready to be shot down but like Phil said spacers are primarily used to "fill the arches" so looking at the pics you posted, there is a bit of clearance from side to sidewall , so try a rear arch on and see if you like it if not space to suit.
Only thing I would say is make sure you buy good spacers / studs as there use to be some dodgy ones around
good luck with the build and keep us posted
