I currently got my 4t6 cab back with similiar problems, The lower front cowl under front fenders I cut out and used a panel flange and spot welded. Cab corners weren't to bad so I used mig with copper backing plate. Some holes got bigger as stated above. I am considering using a product called Lab Metal. I read some good reviews but never used. But with the long winters up here we have a lot of time
Dan
