There are many ways to connect the bowls of a dual-feed carb to the main fuel line, but the simplest is probably a fuel "log" or manifold. By the time you read this, Earl's will be offering a fuel manifold using the Pro-Lite 350 braided line with the black hard-anodized fittings. For our story, we used the standard manifold with stainless braided line and red/blue fittings, since the new black stuff was not quite ready yet. Installation is simply a matter of threading the fittings into the carb's bowl inlets. Earl's recommends using aluminum seal washers rather than the steel washers typically found on Holley-style bowl nuts.