There's a couple guys on the 67 to 72 chevy forum that did the Conversion on there 2 wheel crew cabs nastybuzzard is the one that comes to mind. He had a lot of pics and info no pics now since they where on photobucket. He was gonna make a kit with everything you would need. He has an account on here too but don't see him much.
Got to say my name 3x to summon me. Haha just kidding. I just happen to search cut bros and 4wd conversion and found this thread.
Yes we have a kit designed and done. I am currently working on our how to videos which can be found on our facebook page and youtube. Unfortunatley they aren't the easiest to find yet on youtube because we lack views and followers but were trying.
If you have any questions I am easiest to reach through our facebook page.
Hate to hear you are pulling the plug on the build. Wish I could help. I definitely understand the struggle with trying to do the swap the correct way. I started the same as you and ran into nothing but problems. That is why I was motivated to design the conversion kit.