Offenhauser Dual Port Manifold

Looking for an Offenhauser Dual Port Manifold for a 1965 Mopar 273 with a square bore (AFB type) carb. Ideally, I want a model 6022-DP for a 1964-65 273, though a 6020-DP for a 1966 and up 273 or 318 would be ok as well. Thanks!
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