"Fit check the doors? Why not leave the truck on the tires and get the doors to fit. Then cross brace the cab so there is no movement when patches are welded in. The truck will be sitting on the tires when you drive it. You could introduce some kind of twist up on jack stands due to cab mount rubber and frame twist/sag/suspension stance. Then when you let it down on the suspension, all goes south.
Wait awhile for MNSmith, 52Carl (they are both real nosey on here) and there are other experts to advise now that we know what you are doing. Better wait. What you are doing has been done many, many times by members.

Right is right, even if everyone is against it, and wrong is wrong, even if everyone is for it. - William Penn