The Varajet head also has a single exhaust manifold with dual 2" outlets for a dual exhaust (factory is just a short dual to a Y pipe before the catalytic converter. Integrated J 78 was having an adapter made to connect the Varajet exhaust manifold to a '77-'78 Monojet cylinder head. I don't know how successful he was, but that is also an option with the stock parts.
