Offenhauser Dual Port Manifold

They are not very good manifolds. Think again before using one. Offenhauser's technology is from the 60's and not that great. Way back in 1972, my brother bought a new 72 Challenger 340. He put one of those Dual-Port intakes on it. Years later when he was rebuilding the engine, he put the stock intake back on the engine. He told me that it didn't run as good as the stock TQ manifold does.