Need Help Hybrids and CVD's

The longest possible setup from the parts I have was using the stubs with the extended cups. They were longer than the supplied cups that came with the combo diff. What about the XXL Cvds. I have seen people using those with some mods to the carriers. I wonder if those are longer? Like i said if I take out the 8mm shims I used to shim the diff and shim the diffs between the housing and bearing with the bigger shim I should be able to use the stock axles for now. I am hoping atleast.