Here is the major problem with my $200.00 4x4 K5. At least it runs fine. (except the 4wheel drive doesn't work) How do I tackle this one? Should I cut out the rust and weld in sheet metal? Should I go find a K5 that has a good tail gate are and cut out the body and them weld it into mine? All suggestions Welcome. Thanks in advance. Where did all this rust come from?