Does anybody have long term perspective on this? I was told by a local expert that TIG is the only way to go because of the steel composition of the original Model A frame. He said MIG welds fail or crack over time. If I had a higher opinion of my own TIG skills, I wouldn't even be asking. If it matters, I am looking to weld in flatty motor mounts, k-member, and upper shock mounts on the rear crossmember. Thanks for your input.