As a future cost saving tip for individual 8-stack EFI or Weber carbs, buy a fiberglas (or carbon fiber) rear decklid and clearance-cut that, instead of cutting clearance notches in a $4000 stock steel decklid. Same goes for vented hoods. As is often mentioned after the fact, cut hoods or decks are basically worthless while perfect steel stockers are extremely pricey. If your lid(s) are already cut, do not lose the cut pieces. At large expense, a good bodyman/welder could repair a notched hood or decklid if you (or your heirs) ever decide to sell the car.
D Quella used to sell a setup that allowed 8-stack Webers (or EFI lookalikes) to clear a stock uncut decklid, but it also removed some horsepower and detracted from the showy looks of an 8-stack fuel system.