hi all i have a 66 mustang with 289 and a 500 cfm edelbrock carb. The model number is 1403 to show exactly what model i have. I recently had a friend help me with tuning the carb and while we were tuning it the idle sounded the same and then we tried to drive it and now it wont start. I tried to turn the screws back to where they were originally but it still doesnt start. Is there any way to set the carb back to the factory settings. Thanks in advance for any help.