high or low starter

Hey everyone, First day member here!!!!!! but with a big question...i own 1972 dart swnger 225, and looking to upgrade it with duel carb, manifold and headers from clifford, but there are two different types of headers , one for a "low starter" and one for a "high starter". how can I tell the differance? Oh and yes this is my first MOPAR!!!!!! :) its an automatic