65 c10 porterbuilt inner frame stiffner tko600 help

[DC43]

Hey guys I was wondering if anyone has ran a porterbuilt inner frame stiffner with a tko600 transmission? I've spoke with dave about it and he said gas monkey garage ran one with there pikes peak build but they had to do modifications to it to get it to work with the t56 they used but wasn't exactly sure what they did. I know the t56 is slightly bigger than the tko so I'm wondering if it would still require modification and what that would be. Any light you guys could shine would really help. Thanks
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