My brake booster vacuum line has a 3/8 male that should be connected to my carb.problem is the hole in the back of the carb is 7/16. I have searched high and low for an adapter that would connect them but keep coming up with looks like I do not know what I am talking about.am I missing something here?car is an 84 buick regal.motor is is an 305 oles with a Rochester 4bbl carb with electric choke.thanks