Thanks for the replies.
Yes I'd leave the aircon for what it's worth, again not sure what specs are available as the turbo would take me over the class capacity.
I just wanted to run a different car as the 1B class 1400-2000cc is dominated by French and German cars with the odd Teg.
Getting old means I'm after a car that I can still drive to events.
The Cup currently runs a Gripper LSD and 4.6CWP with a Bilstein B14's on the 4 corners and some other mods, so I'd be doing something similar to the Fiesta.

Regards Russ.........