Im building a custom H1 Alpha. Im getting a rolling chassis and body from Urban Gorilla 4x4 Bodies - Home and plan on dropping a 7.3L Powerstoke Black Mamba in it.

Whole plan is to build it as a daily driver, but still take it off roaring.
Need help with the independent suspension and what kind of transmission to throw in it. Going for the Zombie Apocalypse version look(Picture attached).
The picture shows the slant back, but its gonna be an Alpha for sure. Plan on getting the interior floor board Rhino lined with a few drain holes with plugs, and everything will be water proof/sealed for easy cleaning. Just need advice on which suspension brands and products to go with along with a transmission.