Yikes! Thats terrible. While reading it I was thinking "well, even though the welds are crappy he can at least use the piping as a jig and fix a few things like the wastegate, no biggie." Then, I got to where you said its routed terribly, so it sounds like its headed for the scrap heap. Too bad.
You can probably remake the plumbing from the TC->IC->TB cant you? Seems to me like the poor routing would be on the hot side.
