**Reposting with pictures**
I have a professionally crafted, simplified wiring harness for a Mk1 to Mk3 TDI motor swap. I sent this to a Euro shop in Canada, and they spliced together the 1.6d harness and the Mk3 TDI harness to make the swap basically plug-and-play. This harness easily hooks up under the dash using the 3 stock 1.6 connectors. Everything is labeled!
It basically turns the hardest part of the swap into a breeze.
It cost me over $1000 and a month of waiting to ship to Canada and get it done. If you want to make your swap easy, this is the way to go.
http://imgur.com/a/rDE1z$650 shipped