Hi, Jeep Form. I have a Jeep Liberty 4x4-V6 and like to use a van. this my get me kicked off the site, but I plan to but the running gear from the Jeep into a Astro Van body. Ho one other thing after I get this working I will length the wheel base 48".
Why bother..? They make a conversion kit for your Astro. https://www.journeysoffroad.com/as4-4conversion.html
Why not? I have the Jeep and I want a 4x4 Van. They said the same thing when I converted my 2wd F350 to 4wd, also said it couldn't be done. Why, Because I can. Only problem is I never thought I would be so busy when I retired.
Sound like you have the shop and skills, so have at it then. Update with some pics along the way, would be very interesting.
Converting a F250 2WD to 4WD is as easy as falling off a log really Converting an Astro Van to KJ running gear is going to be a long process and a ton of fab work.