Body removal from chassis

Changed many a car to different model - year - combination my copper car is a 74 Scamp with 69 Valiant front clip 71 dart rear bumper etc made a 71 demon out of a Duster on and on just wondering why asking about taking body off the unibody sub frame
Hey dodge71demon, the reason for the body removal of the body is I need to strengthen my chassis in Australia to put a gen 3 into it. I have a chassis already done a engineered but its a convertible body (some people ruined good coupes) so for $500 i can get the chassis and swap my coupe body into it. Otherwise to get my chassis strengthened and engineered will be $3-4k.. so I'm just seeing if anyone has tackled removing all the spot welds an transfering. Cheers