BioMax
+1y
This question can be made into a 5 part tech article...
I start with a center section capable if the horsepower that I plan on having. then I build or find knuckes that I feel will be appropriate for the project. If I run in-board brakes, I machine up adapters that get sandwiched between the CV and the inner drive-flange. The axles are not ever a concern. The guys at RCVperformance.com are capable of making axles to fix any inner and outer CV combo that you choose for a more than fair price.
On the Chevelle in my profile, I used an obcenely short 9" Ford rearend, but sense then I have found a better, narrower housing.