MANUAL CHOKE OPERATING INSTRUCTIONS (Twin SU )
1. Pull choke out
2. Start car
3. Push choke in enough to fast idle but no choke
4. Drive now (waiting to "warm up" is very bad for motor and environment)
5. Push choke all the way in when temp is normal
6. Don't use the heater until the temp is at normal

The choke cable does 2 things A) it lowers the jets to richen the mixture for starting and; b) It operates the fast idle cams. When you pull the choke all the way out the jets are lowered and the fast idle cams open the throttles past the normal idle screw. Pushing the choke about half way in should completely raise the jets to the "no choke" position but still leave some fast idle on. Take 5 mins. to check out how far you have to push the choke in to completely raise the jets. If your SU's are in good shape and engine tune you should only need the choke for starting unless it's really cold. (not something we suffer from down under). No goosing should be required.