Hello everyone, I recently purchased a 1978 GMC C2500 Sierra Grande and I have been fixing it up these past couple months. I’m not sure if the engine itself is original, but do believe the serpentine to be from a 1994-ish small block. I am now stepping into some territory that I’m learning as I go ( as far as engine work). The truck runs and drives but as I have been fixing up power steering, alternator and some other smaller parts I have noticed a couple of issues that don’t seem to be correct. First off regarding the carburetor, there is a gap between the carb and the manifold. Is this just the wrong carb for the manifold? Or was it installed poorly? Both the carb and manifold are edelbrock. Secondly, where is this supposed to connect too? It comes from the rear of the driver side valve cover. Thanks in advance.