k5 calipers hit the wheel?

[stizkidz]

I am almost done with my axle install. I ran into a new problem. I used my stock K5 calipers and bolted them onto a 10 bolt from an 85 K20. I installed my 15x10 8 lug steel wheels and the calipers hit the wheel. Any idea why this is happening and what I can do to correct the problem?

 

[joez]

Get out the angle grinder, and start grinding on the calipers where they hit.

 

[AkMudr]

How much backspacing on the wheels?