Step 4 is to remove the choke. We start by taking out the screws holding the butterfly (choke valve) in place, and removing the butterfly. We also have to remove the screw on the end, and pry off the tab.

Next, we remove the 3 screws and clamps holding the mixture adjustment in place. We pry it off and remove the spring. Note that when I parked the Chevy, the mixture was set at 3.5 marks CW past vertical. This may change, however, if the tension in the internal spring has changed due to the heat.