Wheel spacers caliper clearance

I have put my willwoods on but the wheels dont fit, the caliper is too wide so needs a spacer for clearance. Has anyone had similar problems and how big would the spacer need to be. Any advice would be most appreciated. Thanks
Matt

who made up the brackets for your wilwoods mate? and what size discs are you running?

It depends on a couple of things - The actual type of caliper used and it's spacing to accept the relevant disks. Also, the actual wheel, not just the rim size, as the spoke designs are different - Some fit and some won't!

I got the brackets with the kit. I have measured everything and its proud by 8 mm so a 10 mm spacer should do the job. Im using the mk2 16v bbs wheels 15" and 280 mm disks. Cheers
Matt

Another useful link

http://www.europerformance.co.uk/pages/products/product_info.mhtml?id=152264