Here are the facts on that style Holley. You do not file it you straighten it. If the air cleaner stud threads into the air horn than it is a early model not what a 79 would have. Those are junk. You need the long style stud that screws down into the base or mid section. The bridge kit was a band aid for this. Here is a photo. Plus your model van should have a 2245 series not the 2210. Post some pics of the stud and air horn.