I was working the other way around the past couple of weeks. I've been lookiing at the bolt-on spots for removing the front C-clip, stuffing the salvaged Duramax/Allison/transfer case/drivetrain in there. Of course, I would need to salvage the ECM, TCM, BCM, steering column, instrument panel, and various other modules/sensors.

I'll have to go out and measure the wide of the axles/bodies of said comparison. I've got both out in the garage, just need to have someone hold the other end. (I'll see what my wife is doing.....)

I'm afraid just putting the VX body on the Chevy chassis would look like putting a hat on a railroad car! My crewcab is exceptionally long, so length obviously would have to be shortened, it's the width that could get a little absurb.