In the Bishop Tardell book they describe how to mate the Model A flange steering box mount to the F-1 box. I understand this and think that it is a good way to do it. My question is they say you can mig weld it. These boxes are cast aren't hey. At least mine are. Is mig welding the proper way to do this & if it is what kind of wire do you use?? Thank you in advance for any feedback here.