From Advance Adapters website
The Atlas 2 speed (4.3:1) prices at $2295 + shifters.
ORD will provide a complete doubler (w/ rebuilt cases) for about the same price.
The cheapest alternative w/o bells and whistles--
I picked up a 203 compatible w/ my tranny for $50 (doesn't appear to need a rebuild). Have a rebuilt 205 that needs machining for the larger bearing in the doubler kit or NW Fab is offering an intermediate shaft that will use the smaller bearing (205=$0). Doubler kit = $700. Drivelines = $300 (guessing). Steel for additional crossmember = $100. Dual stick shifter = $185.
Seems to me that the DIY doubler w/o rebuilding tcases is about $1000 cheaper. Of course my time is free
Using the smaller intermediate shaft may not be as durable, but I'm not planning on running tires bigger than 38" anyway. Am i missing something??