I started the mockup with taking some careful measurements and building a plywood mockup of the right front cab corner as my cab is too close to paint to mess it up now. Note the UPS bubble wrap sending envelopes they work great to keep from scratching the brackets. I mounted the fender and all the brackets and hardware to the mockup. I placed the new spare in place and found that it was quite a bit smaller. I fabricated a patch for the top of the pocket.