Bolt spacing from std to cup pack size?

[Stu_182]

What's involved in changing the spacing from a set of coilovers from the smaller bolt hole spacing to the cup packs size? What have people done on there's? I would take them to machine shop and get them to do it but just looking to find out how it's been done before? Is the original hole filled then re drilled?

Thanks

 

[ripp]

original hole is left in place, and re-drilled one 6 mm further, as far as I remember k-tec did this with their cup pack coilovers. some maths involved when doing this because you can mess the camber if drilling in the wrong place