A mechanical setup really needs accelerator pumps on the outboard carbs. There use to be a company called "Six Paks To Go" that did just that. You sent them your carbs and they modified them with pumps and squirters, and a mechanical linkage,etc. The parts required to do the job were almost entirely off the shelf Holley rebuild parts, with the exception of the linkage. A little drilling, a little grinding. They even relocated the idle screws for easy access.