Duramax in a 67-72?

[K2Orion]

Hi, I was a member here 4/5 yrs ago. I left for awhile to spend time at ck5.com and pirate when I was doing more offroading. Now I'm back and starting more of driver/project. So, I spent all day searching, couldn't find what I wanted. So anybody swapped a Dmax into 1 of these trucks? Links or a point in the right direction would be great. I also have been searching on dieselpage.com, dieselplace.com, dieselgarage.com and a bunch of others but they cover so many makes, models and years so I decided to come back here.