Why would passing an emissions test be difficult?
These cars had to pass ADR27A in 1979.
Today's fuels burn much cleaner.
The efi system will ensure cleaner burning of the fuel than the OEM carburettor.
If issues are likely program the efi to the lean side to pass the emissions test.
After the test reprogram to what you want.
 
I am going down the same path with a turbocharged 2.2 litre Escort engine with programmable efi.
I expect the engine to have far less emissions than the standard 2 litre engine originally fitted to the car in 1980.
 
:)

That was my understanding as well. You have to meet the emissions of the engine you are using not the car.
That said so many of the rules seem to be open to interpretation. For my exhaust I had a catalytic converter
added as the Zetec had one from factory. Whether anyone took any notice of it or not can't say.

I’m just gonna do what I’m told 😉.
Hoping it all goes to plan.....

Fuel tank is finally in after much procrastination in how to securely position the tank approximately 30mm lower at the front to accommodate the additional height of my custom fuel pump arrangement. Ended up fabricating standoffs that incorporate the original mounting hardware plus an EB Falcon fuel pump cover plate to finish it off.

Impressive job on those lines mate, well done

Doing a few things in the background in preparation to begin the engine work. I've never been happy with the Dellow Toyota W50 5 speed conversion as it never really worked correctly in the previous car (mated to a Pinto) as the clutch could never be adjusted correctly. It either slipped or would never "de-clutch" sufficiently to engage gears at standstill (reverse / 1st etc). I feel this was due to not having sufficient room to allow for the clutch and release bearing stack height which would have the clutch release bearing pre-engaged with the clutch the entire time. Add to this the miss-matched geometry of the Ford release lever and the Toyota box which never really had adequate travel to fully de-clutch. Obviously doing all the math I have confirmed that this is in fact the case now using the Zetec and I need to either change or modify the current arrangement.
Hence I'm looking at going to a concentric hydraulic release bearing arrangement as this has far more scope for modification to suit my combination as I'm not bound by the mechanical clutch cable. Adding to this the pedal height can be lowered to match the brake and accelerator positions and still have adequate travel to operate the slave through it's effective range.
So, that means I need another outlet from my pedal box through the bulkhead - good thing I planned ahead 
I have a bracket ready to mount to the chassis to secure the flexible hose from the slave which I will the connect the hardline (once I figure out the correct length and flare it).

Celica box, ah yes... Mine has molested starter threads in the housing and hard to get to with zetec in place, it'll be coming out for helicoils . With the clutch throw business, I think I machined up a longer sleeve on mine and that rubbish spigot bush I got (also one for you back then) disintegrated while sliding the box up to the motor so I machined a new steel one... Not sure how long it will last when operational but better than Dellow ...

Found a pic after mine obliterated it's self, I made a steel one, whether it works or not...