I can't imagine anything could go wrong unless someting was not to spec ! I just did a Jspec engine swap on my 91 TT because I blew a head gasket ! .. the car runs the same way as the first day I got it 8 years ago .. with a 55K miles Jspec engine !! that is 13 years old !
The trouble with doing something right the first time is that nobody appreciates how difficult it was. PLEAZURE in SD