Big brake upgrade

I have now fitted the Wilwood front brakes and just need to bleed them .
I did once but found a leak on one of the new braided hoses (just not tightened up enough )so will need to do it again.
I weighed the parts of the new ones ,caliper pads and one hose and it came to 3.15 kg.
The old one came in at just over 5.2 kg with worn pads in them and maybe a bit of dirt etc on them as well and possible a little fluid still in them.
But I reckon about 2kg weight saving each side and hopefully a bit more braking strength ,which I have not tested yet.
Only issue I have found is the caliper is slightly too close to the wheel spokes and may need a thin spacer.
They don’t actually touch the 17 inch alloys and they spin freely but its close .
I did think maybe a washer on the fixing block would bring the caliper in a fraction and bring it away from the wheel?
Does this sound feasible ?
Any advice appreciated.
Regards
Rob
I will post up some pics if I can fathom how to do it.