Gotcha. This is a manual choke if that matters? I can post pictures later today. It’s got maybe 300 miles on it. Had it on a 351w mustang GT that I built for my wife. She sold the car to some lowballers and got the new car itch. I kept the carb and some other parts,not enough, and put a rebuilt afb on it.It’s for a 451 mopar im building. A 650 isnt big enough. Hence the question of calibration. I don’t have a thermoquad strip kit anymore. Thanks,Mark.