The Klune-V won't bolt up to a stock C5.
You would have to put the outputshaft and 4wd adapter from a C4 in/on it. They don't make an adapter to the 1350 (POS anyhow) either. I doubt the 1350 would last long in that setup.
Either go C5-Atlas2 (roughly the same cost as a Klune-V)
OR
Get a C5 bellhousing and put the C4 behind it. Then get the Klune-V and put the Early Bronco D20 behind it.
OR
Get the C4 output shaft and 4wd adapter, get them installed, then get the Klune-V, then have it mated to a D20 t-case (found in Early Broncos).
The last two would be more expensive, but with a better crawl than a 4.3:1 Atlas 2. However, unless you are going to have the suspension to warrent having such a low crawl, there really isn't a point.