How much weight gain from adding a Dana and roll cage.

A lot of the weight in aDana is the carrier. a spool makes them much lighter. The truck Dana in my caris 45" wide. With Ladder bar shock, and wheelie bar mounts it was 165lbs. chrome moly weighs no less than dom or elw. It's what thickness you can use. The thickest tubing required in a CM cage is .083", dom is .120", elw must be .134" to pass cert. CM must be tig welded.
Doug