My 78 K15 High Sierra build - Fish Tremble

[rgunlock]

This is where having all the left over patch panel helps. Using a few basic tools you make your own patch. In this case, a couple pieces of angle iron in a bench vice, plus brute strength and a hammer works as an acceptable sheet metal brake. Not shown, but I used the cut out piece as a pattern to cut out and find the right spots to bend in some angles. I use this purple scotch pad kind of "surface prep" disc on the die grinder to clean the rust off the edges of the hole to be patched, as well as to clean up the edges of the patch itself to get clean bare metal.

Then a few spot welds to hold the patch in place and moving around fill in the gaps between the initial welds.