|It isn't that hard, and it looks like you are likely buying a new EFI harness anyways so ...
I posted about it in the Tech forum. I'll see if I can find the link ...
ConVerTT - 93 Hi Compression TT Convertible (black)
XtraVerTT - 93 Hi Compression TT Convertible (glacier white)
SlickTTop - 96 OBD1 TT Slicktop (black)
Old Yeller - 90 Slicktop NA (PGY)
RedZed - 90 "factory" 2+0 TT
EmoZed - 89 RHD for parts - RIP
And their hot Asian Cousin - 01 Acura NSX NA