96 roadmaster estate wagon onto 4wd frame

hello, my name is mythi i am new to the forum. I am looking to make a roadmaster 4wd.
I am going to pick up my roadmaster next weekend. I have been looking into making it 4wd for Colorado.
I seen a guy make one that was lifted and on a suburban frame that he modded. I am looking for the best crossover so i can just bolt it on and be good. i am thinking of using a Tahoe frame with a 6.2l motor. I would like the rear cargo bay to sit about waist high so i can load wood and such in the back easily. If anyone has done this; or has any input that would be a great help. I know the Tahoe and Yukons have about the same wheelbase as the roadmaster. I will need to check axle length to make sure i can turn the wheels. I will need to use bigger wheels than the stock roadmaster wheels so they will also need to be able to fit in the wheel wells. The newer Tahoe have 20' wheels but i would like to use the older 16s. I do not mind if the wheels end up sticking out slightly from the body as if it had axle extensions, as that would look good to go with my mad max wagon build.

Other info on my project idea is to tint the windows and take off the chrome molding and have the bottom of the body under the vinyl wood siding be rhino lined. the car is coming from MN and i know there will be some under rust. i am going to put it on the lift and wire brush it off and rubberized under coat the body. Also i will be changing the lighting to led for brighter lights. Any other mod or upgrade ideas would also be nice.

Thank you

 

i have also herd that the suspension is boaty on the roadmaster and i am hoping this will help fix that. I don't want to use a 1/2ton frame like a truck as it will be to stiff.

 

A modern Chevy Tahoe seems to be your best bet. Wheelbase is the critical factor. The Roadmaster's wheelbase is 115.9" A 2000 Tahoe has a wheelbase of 116" - so close enough. The wheelbase has stayed the same, right up to the 2016 model year.

There's probably some other factors involved, like width of the frame, location of body mounts, etc that you will have to take into account. You will also have to do some electrical sleuthing to integrate the Tahoe's electrical system with the Roadmaster's body control module.