All you'll need is that v6 adapter for the v6 tranny to the 4cyl crawl box. Then the dual adapter like you said (mc08). Then it would be a good idea to get a dual t-case crossmember. And you will have to lengthin the front driveline and shorten the rear driveline. And if you want the speedo to work you will need a speedo cable extension. I'm pretty sure marlin sells everything you need except the drivelines.
I have the same setup in my truck. 3.0 v6 to v6 adapter to crawl box to mc08 to rear t-case with 4.7s. Happy wheelin
and the v6 tranny has a 23 spline output. I'd say it's a good idea to keep with the 23 spline so you will need to get 23 spline input gears too. One for the crawl box and one for the rear t-case And make sure your dual adapter is a 23 spline unit also.
