Check out your local car parts swaps. I usually found carbs for the 5-15 dollar range for parts. Is yours stripped out where the needle and seat threads into? If so, the cause is using a non Holley needle and seat which uses a big brass nut to lock things down. You get these in parts store aftermarket carb kits. The thread pitch is off 1-2 threads from the correct one and will strip out the bowls. Gots to use oe Holley or one of the better companies like Quik Fuel etc to get correct stuff.