In response to all of the above posts.
Thanks for all the compliments on my truck.
To each their own. Much of what we do with this old cars have it's roots in hot rodding which began with guys taking what they though were cool looking old cars and making them COOLER looking, adding newer drivetrains, suspensions, brakes, etc. It really hasn't changed all that much. Some people consider themselves purist and want the car as it came from the factory. However MANY of them talk out of both sides of their mouths because the do internal engine mods, paint the unerside of the car as smooth and shiney as the top side, etc, etc.
Myself I am JUST A CAR GUY. I do them the way I want them. I don't re-surface suspension parts to "appear" unpainted cast parts or the look alike cosmoline items. I paint most of those thing black just to keep them from rusting. I like an original looking body, interior, engine & comparment. I like period correct (including aftermarket) wheels & big tires. I especially like internal drivetrain mods to make it run better than stock. I am spoiled because of the modern cars and like hidden creature comforts like good stereo, power windows and A/C. This is just me.
Regarding how the guy did the 4X4 conversion on the subject car, it is not that hard. You just find a chassis that will fit wheel base wise for the body you want to use. If you can't find one you just shoten of lengthen the frame. Truck equipment companies do it all the time for flatbeds, service bodies etc. The trickiest then is making the steering column work because of the different angle from the stock car to the 4X4 chassis, but there are ready made product to over come this problem.