Finally the 66 Dart is here!!

Bummer Scott. Glad to hear it didn't tear it up worse. Looks like you didn't get good enough penetration. Crank up the heat and you should be ok. You may know this but in case you don't weld a little and take a break to let it cool so it don't warp then weld some more. Those axle tubes aren't all that thick and warp kinda easy.
Yeah was a crusty old housing I had kicking around.It will be a tank after I,m done this time.I keep a soaked rag and bucket of water for cooling welds.Gussets will help also.I,m glad it happened at the line,cause I shut er down quickly,glad not to have damaged my spragg.