Who is the source for the ultimate NP205

[JimJones]

I found JB conversions
http://www.jbconversions.com/index2.php?pc=3


And was wondering if anybody here has had any experience with them? I want the absolute best NP205 that money can buy.
It will be going on a complete frame off restoration it will reside behind a SBC and a NV4500 tranny. Engine will be around 450hp tires size will be 33-35" and I want something that will last 100k mi and be able to withstand some burn outs and fish tailing without breaking. The finished truck won't see any rock crawling or mud bogging mostly dirt roads and the occasional muddy cornfield.

This will be a "retirement" truck for me. I will eventually be retiring out of the country and won't have access to parts so 100% 100k mi reliability are of paramount importance to me. I need a transfer case that will meet the above criteria.

Are there any downsides to this T case?