Thank you Oscar and Kiwi2wheels for the response. I never realized that TIG welding on top of an existing MIG bead would cause a problem, but it sure did. These headers are ceramic coated steel and I believe some of the ceramic was still present in the nooks and crannies of the existing bead. Very ...

8F6653C8-3DA8-4F8E-9E59-56FAC95794CF.jpeg . Hello all....this is my first post. I’m a hobby welder that loves Rat Rods and have been using TIG for the last four years. My latest project is a 1937 Ford panel truck running a Chevy LS 6.0. I picked up a set of headers from CraigsList and was anxious t...