I got my carb back from Jim C. and things ran great. I was hearing some exhaust leak,so I thought I'd put a new gasket on the header.It was after I had the new gasket installed,did I realize I should use two gaskets.Well,on the way home,it blew out.It's not bad,but enough to know it's leaking. I checked the vacuum and it's running around 11.I also noticed the carb is leaking around the primary throttle shaft below the sight glass.It only leaks when you work the linkage and not running.I ordered the two piece header from sor and two Felpro gaskets.My question is,will the gasket leak mess up the idle that much?And why would the carb be leaking? I can get it to run,but I have to keep the choke out. I'm not messing with the adjustments until I get the new header on. Thanks for any help!! I forgot to say it's a '74 40 with the F motor.