The the XE or even the TE 6 number will be too short, okay? All 2 litre Webers have a long rod to the carb, all ADM webers have a short cable which wont fit around the Holley 4150/4160 carbs, and the Bendix 1-bbl has a similar cable length to the ADM Weber jobs. You'll have to cobble one up to suit with a longer cable secured by the same kind of securing lugs used on the 2-litre Cortinas. They hook to the heater box on the early cars, not sure about the TE's. Make sure it doesn't vibrate against the bulk head or it'll drive you nuts. You cant use the rocker cover like the cross-flow Falcons or Cortinas did 'cause the carby throttle is take up from the left hand side.
The solution is to get a truck cable with the Cortina and Falcon XE ball on it. Isuzu or Hino or whatever, but it must have a very smooth inner surface to minimise binding, or the gas pedal will be at best stiff, at worst, dangerous and unwarrantable. A good auto parts person who does handbrakes and cables should find some kind of good stuff. I used a Valiant cable, and it was worse than useless, it bound up something chronic.
If you try about 1.53 for the cable from the tip of the accelerator to the tip of the 6mm ball, then it should be okay. On a Cortina, you need less than this as the bulkhead is further forward. About 1.435 m for the cable, with the adjustable piece linked by a Valiant VG steel bracket. The use a Cortina or XE Falcon plastic clip to move the cable in and out. For goodness sake, use the Valiant return spring at the front to ensure the Holley carb returns to kerb idle. Place the ball at about 36 mm from the axis of turning, and ensure you can bury the boot deap into the floor-boards at wide open throttle. The throttle turns through 80 degrees, and needs to have a lot of mechanical advantage to make the car safe.
A six cylinder Corty can smoke tyres like a Chernobyl China Crisis. If you follow these guidelines, everyone will love driving it. Get it wrong, and it'll take a life!