Thanx for the replies guys.
My concern for now is strength and longevity. The truck in question will be used regularly and should be able to hold up.
It sounds like this is the swap for me.
Now to do the research and start looking.

The information in the above link is very helpful.
Anybody have a link to the swap into a 70's d200, and what is needed?

It will be awhile.
I will start a new link once I get the parts and get ready to get started.
I am guessing I will need everything from the master cylinder to the output yoke, possibly even a drive shaft.
Scratching, I look forward to this swap and your trucks are legendary.
I hope you don't mind I will be looking for a brain to pick and you seem to be THE guy.