I recently lost a point on my tri power carb base gaskets. In the comments area it just says, base gasket. I swear I changed them about 5 years ago to try to be as original. On the front carb, on the driver side there seems to be some extra gasket material that extends beyond the base. Maybe the gasket fits several carbs. Does anyone have any idea if that sounds like my issue. #2 if so , where do I get the right gasket,#3can i just get an exacto knife and cut it??