[wizard]

Finally got my gasket set back from Edelbrock. They are not marked "up" or "front". They are symetrical front to rear except that there is an extra square hole on one end. Since the heads are the same, does this mean that the gaskets go on with one square hole at the back and one at the front or do I flip one over to get these "special" openings at the same end of the block and if so front or rear. I can call Edelbrock on Monday but think I might get any needed advice above and beyond here. God, I hope this works.
Also, there are two openings which allow heat to rise up to the carb. I've heard that these can be blocked to get a cooler running carb. What's the best option here? Many thanks in advance.