Martin
I think you will need the engine wiring loom for the VVC also, as your 1400 ss loom wont be compatible with the non stepper motor throttle body on the VVC and the ECU.....but I expect someone will be along shortly to correct or confirm.
I found it an easy swap by fitting a non VVC 1800 ss and retained all the induction/ wiring / ECU from the 1400, changing only the injectors. There are a few other minor modifications necessary, do a search as there is loads on this in the archives.
Malcolm