Shop Shark, I reason I think it might be easier is because the drive line and fuel system would already be there as well as some of the electronics/ECM. I don't think shortening the frame of the suburban would be that tuff. From what I see the track of the suburban is about 64" and the AD is about 61". I know the suburban frame is wider.
I haven't began the project yet so I am just looking at options.
Thanks to everyone that has responded