Edelbrock carb on factory spreadbore intake
All you need is Edelbrock #2732. You don't need any of those stupid 1" thick aluminum spacers that always leak.
This one:
Edelbrock Carburetor Adapters 2732
Looks like they don't have them in stock. O'Reilly stocks them. Your local O'Reilly should have one hangin on the wall.