Duster full floor pan replacement

It's going to be pretty difficult, if it's even possible to weld the pinch weld at the firewall and transmission tunnel with the motor and transmission in it. I would pull the motor and transmission out to keep it from being such a pain in the butt. The floor pan is a big part of the unibody integrity, so you don't want to half *** weld it. Get the car up on jack stands, level front to back and side to side. I would also support the rocker panels with a 4x4 pushed up against the bottom of the rocker and wedged in place. I didn't look, but there are probably some videos on You Tube showing Mopar floor pan replacement.