Ok, back to this thread again. I ended up just getting a full quarter and cutting it down to make my skin.
The test fit was good, got everything screwed down how I liked it. I ended up taking my cut off wheel and cutting the old metal right along the top of the seam of the new metal, making a perfect seam, and butt welded the entire thing. I actually think this way would have been way easier than doing an overlap weld.
Well, I'm here now to deal with the woes of butt welding. Even though I spaced my tacks and let them cool naturally, I've got some pretty serious warpage. One of the pics lets you see it real well.
I went back and reread what puggy offered....on dolly hammering, then shrink. I would like more advice on this. I finished everything up then did not even touch the warpage until I see what is recommended here.
The problem I get with on dolly hammering is it makes a real low spot where I was doing the hammering, even though I'm trying to hold the dolly tight against the back. Am I doing something wrong?
Given what you see in the pics, what would you guys do. The high peaks and low areas are very obvious to feel out.