Suburbalade... reasons why I should not!

[AzDon]

The stock chassis is rugged, but as minimal as possible at the same time and was specifically designed by GM engineers to fit the body and be easily serviceable. You MIGHT get the cad chassis to fit under there, but you will give up precious under-body space that will limit what can be done under there. Besides wheelbase, you need to also take careful track-width measurements also!
If you do this, show us lots of pictures!