I just started minitubbing my 66. The frame is a C-channel and when you grind the side of the frame to make the inner tub sit flush, it separates the frame from the floor pan. Do I need to weld the floor back to the frame, or can I just weld the inner tub to the frame then weld the floor to the tub? I'm sorry if this is a stupid question, this is my first experience minitubbing a mopar. Thanks for the help. I'll get a picture very soon.