Since I have a pacemaker/defib I'll have to use a torch. I used to bend brazing rod like a snail shell the size of the hole used duck tape to hold in place then spot brazed it on top and bottom then filled it up, using the smallest amount of rod as possible then ground and sanded down smooth once cooled. I did this when in High School on my 59 chevy 1/2 ton stepside, it had several holes from old after market heavy duty bumpers. As soon as I buy another oxy/acc setup I will do it again. My 2A has some non factory original bolt holes. The good news is now with my PM/DF I can jumpstart my own Willys when needed.