I had the same issues as jorb with the front cab supports basically collapsed and the pedals scraping the top of their openings. The steering column was doing most of the support of the front of the cab.
I pulled the cab off and braced it, paying attention to the door positions, and double checked them before I welded the rockers in. They SHOULD fit when I put them back on.
I also confirmed the position of the front cab mount bolt holes with respect to the firewall using the dimensions in the FAM.
It looks to me like the OP has done a good job of bracing the door openings.
