Cylinder wall weld??

This is a long post so bare with me. I was racing running 10.0’s in my 440 duster. 3rd round I won but the car slowed up. No miss and oil pressure was good. I dialed up .10 for fourth round and won. Dialed up .10 again and kept doing this till the final were I lost. A quick check at home Sunday night found it was torching between 3 and 5 and ate .100 into the head and block. Monday I called and asked 7 different welders and they said for sure it couldn’t be welded together and in the car. I found a guy 20 miles from home so I towed it out. He said he could weld both and asked how I was going to machine it. I told we weld and file gears and stuff all the time in the mill so he said it would be 125.00 for both. Tuesday night it was done so I went to get it. This guys filed the head and block and I said hey what’s up. He said he couldn’t believe that could be done. He did a great job and lowered his price to 100.00. He explained hey I learned something that I can now offer. It held up great for years.