There actually were some cracks in the replacement piece which I think is normal, I welded them up and installed the new plate.
Welded from the back side to try and keep the outside grinding and cleanup down. I still need to get into some of the inside radiuses with a die grinder stone but it's not bad and the door shuts great now.
I hung the LH quarter skin tonight also.
I have to finish my wheel house welds, actually I need to do all of my bottom welds, but it's tacked up top, tail pan is welded and door jamb welded. Fits nice.