^^ thank you. I've actualy answered most of my questions calling EFI Hardware. They have run V10s on a single actuator so it's capable. It can pull a load of 5kgs and as a rule of thumb if you can hand operate the mechanism, the actuator will cope with it. Just need to package it so it will pull on the common throttle bar lever. Re the pedal I'm not going full Tilton etc so just need a floor mounted DBW pedal. EFI have a solution here as well. Mount their assembly somewere on the floor behind the pedalbox and attach to the factory pedal with a rod. Job done. It has a return spring too.
https://www.efihardware.com/products/2503/Drive-By-Wire-Throttle-Pedal-Position-Sensor-Kit