Bummer the old fordcortina.com.au site just shut down a week or two ago, the info would be on there but it'd been a ghost town for a while now.
No to the tail lights.
Front door cards yes, maybe the rears, the rear doors are different but I think its just the top frame and glass.
Bonnet yes.
Suspension and diff shouldn't be an issue.
Engine wise I think there was some firewall differences between 4 & 6cyl but I could be wrong and that might be the TD. I'm getting old aswell
Google images may be worth a try for comparisons or pm me and I'll take some shots of any areas of doubt for you from my 6cyl TD.