I have a 78 El Camino that has an Edelbrock 1405 on it. Ever since I bought it, it won't start if I let it sit for a day. Gas seems to drain out of it. I took apart the carburetor and found a hole at the back of one of the gas float chambers that doesn't seem right. Is that hole supposed to be there, or could that be why the car is having problems starting? This is my first attempt at mechanics so I'm not quite sure.WP_20150820_002.jpg