This is a good source of info and parts from UK but not always cheap.
http://www.burtonpower.com/tuning-gu...k2-tuning.html
This is a good source of info on Aussie cortinas
http://www.pixelmatic.com.au/cortina/cortina.html
This is a great cortina forum and these guys mod cortinas (Nissan engines etc)
http://www.cortina-mk1classifieds.com/forum/