Rear axle swap out for disc brake upgrade + 5 lug conversion

[Neinris]

Originally Posted by Compeer

Don't grind the caliper, you can induce hair line cracking, mine sit that close as well and its fine.

Not me, sh0rtlife wants to do a rear disc conversion as well, but wants to retain his 14 inch wheels. I said I think might still work with14's, but may or may not require grinding the calipers just a tad. He's retaining the smaller rotor size up front.
Would you try and acquire a 14" wheel and see if it'd fit in the rear?